1901166367 has 4 divisors (see below), whose sum is σ = 1901270160. Its totient is φ = 1901062576.

The previous prime is 1901166359. The next prime is 1901166437. The reversal of 1901166367 is 7636611091.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7636611091 = 89 ⋅85804619.

It is a cyclic number.

It is not a de Polignac number, because 1901166367 - 2³ = 1901166359 is a prime.

It is a super-2 number, since 2×1901166367² = 7228867110023957378, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901166307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16267 + ... + 63772.

It is an arithmetic number, because the mean of its divisors is an integer number (475317540).

Almost surely, 2^1901166367 is an apocalyptic number.

1901166367 is a deficient number, since it is larger than the sum of its proper divisors (103793).

1901166367 is an equidigital number, since it uses as much as digits as its factorization.

1901166367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103792.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1901166367 is about 43602.3665298112. The cubic root of 1901166367 is about 1238.8157195816.

The spelling of 1901166367 in words is "one billion, nine hundred one million, one hundred sixty-six thousand, three hundred sixty-seven".