891625969 has 8 divisors (see below), whose sum is σ = 960503040. Its totient is φ = 822790416.

The previous prime is 891625957. The next prime is 891625991. The reversal of 891625969 is 969526198.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 891625969 - 2⁷ = 891625841 is a prime.

It is a super-2 number, since 2×891625969² = 1589993737190377922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891625919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45342 + ... + 61960.

It is an arithmetic number, because the mean of its divisors is an integer number (120062880).

Almost surely, 2^891625969 is an apocalyptic number.

It is an amenable number.

891625969 is a deficient number, since it is larger than the sum of its proper divisors (68877071).

891625969 is a wasteful number, since it uses less digits than its factorization.

891625969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20759.

The product of its digits is 2099520, while the sum is 55.

The square root of 891625969 is about 29860.1066474988. The cubic root of 891625969 is about 962.4855904741.

The spelling of 891625969 in words is "eight hundred ninety-one million, six hundred twenty-five thousand, nine hundred sixty-nine".