925805981 has 4 divisors (see below), whose sum is σ = 925867872. Its totient is φ = 925744092.

The previous prime is 925805963. The next prime is 925806019. The reversal of 925805981 is 189508529.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-925805981 is a prime.

It is a super-2 number, since 2×925805981² = 1714233428910744722, 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 (925805581) 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, 7016 + ... + 43598.

It is an arithmetic number, because the mean of its divisors is an integer number (231466968).

Almost surely, 2^925805981 is an apocalyptic number.

It is an amenable number.

925805981 is a deficient number, since it is larger than the sum of its proper divisors (61891).

925805981 is a wasteful number, since it uses less digits than its factorization.

925805981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61890.

The product of its (nonzero) digits is 259200, while the sum is 47.

The square root of 925805981 is about 30427.0600124297. The cubic root of 925805981 is about 974.6304910559.

The spelling of 925805981 in words is "nine hundred twenty-five million, eight hundred five thousand, nine hundred eighty-one".