1901390195 has 4 divisors (see below), whose sum is σ = 2281668240. Its totient is φ = 1521112152.

The previous prime is 1901390171. The next prime is 1901390207. The reversal of 1901390195 is 5910931091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1901390195 - 2⁶ = 1901390131 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190139015 + ... + 190139024.

It is an arithmetic number, because the mean of its divisors is an integer number (570417060).

Almost surely, 2^1901390195 is an apocalyptic number.

1901390195 is a deficient number, since it is larger than the sum of its proper divisors (380278045).

1901390195 is an equidigital number, since it uses as much as digits as its factorization.

1901390195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380278044.

The product of its (nonzero) digits is 10935, while the sum is 38.

The square root of 1901390195 is about 43604.9331498169. The cubic root of 1901390195 is about 1238.8643337322.

The spelling of 1901390195 in words is "one billion, nine hundred one million, three hundred ninety thousand, one hundred ninety-five".