1925371681 has 4 divisors (see below), whose sum is σ = 1952489664. Its totient is φ = 1898253700.

The previous prime is 1925371663. The next prime is 1925371691. The reversal of 1925371681 is 1861735291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1925371681 - 2⁵ = 1925371649 is a prime.

It is a super-2 number, since 2×1925371681² = 7414112219993531522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1925371691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13558885 + ... + 13559026.

It is an arithmetic number, because the mean of its divisors is an integer number (488122416).

Almost surely, 2^1925371681 is an apocalyptic number.

It is an amenable number.

1925371681 is a deficient number, since it is larger than the sum of its proper divisors (27117983).

1925371681 is an equidigital number, since it uses as much as digits as its factorization.

1925371681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27117982.

The product of its digits is 90720, while the sum is 43.

The square root of 1925371681 is about 43879.0574306240. The cubic root of 1925371681 is about 1244.0510246145.

The spelling of 1925371681 in words is "one billion, nine hundred twenty-five million, three hundred seventy-one thousand, six hundred eighty-one".