1010001901 has 4 divisors (see below), whose sum is σ = 1015582204. Its totient is φ = 1004421600.

The previous prime is 1010001899. The next prime is 1010001907. The reversal of 1010001901 is 1091000101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1091000101 = 23 ⋅47434787.

It can be written as a sum of positive squares in 2 ways, for example, as 289884676 + 720117225 = 17026^2 + 26835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010001901 - 2¹ = 1010001899 is a prime.

It is a super-2 number, since 2×1010001901² = 2040207680047227602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010001907) 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, 2789880 + ... + 2790241.

It is an arithmetic number, because the mean of its divisors is an integer number (253895551).

Almost surely, 2^1010001901 is an apocalyptic number.

It is an amenable number.

1010001901 is a deficient number, since it is larger than the sum of its proper divisors (5580303).

1010001901 is an equidigital number, since it uses as much as digits as its factorization.

1010001901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580302.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1010001901 is about 31780.5270724071. The cubic root of 1010001901 is about 1003.3229130188.

The spelling of 1010001901 in words is "one billion, ten million, one thousand, nine hundred one".