925166621 has 2 divisors, whose sum is σ = 925166622. Its totient is φ = 925166620.

The previous prime is 925166597. The next prime is 925166623. The reversal of 925166621 is 126661529.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 921122500 + 4044121 = 30350^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 925166621 - 2²² = 920972317 is a prime.

It is a super-2 number, since 2×925166621² = 1711866553225115282, which contains 22 as substring.

Together with 925166623, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 925166621 parts by 43015 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (925166623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 462583310 + 462583311.

It is an arithmetic number, because the mean of its divisors is an integer number (462583311).

Almost surely, 2^925166621 is an apocalyptic number.

It is an amenable number.

925166621 is a deficient number, since it is larger than the sum of its proper divisors (1).

925166621 is an equidigital number, since it uses as much as digits as its factorization.

925166621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 925166621 is about 30416.5517605136. The cubic root of 925166621 is about 974.4060800148.

The spelling of 925166621 in words is "nine hundred twenty-five million, one hundred sixty-six thousand, six hundred twenty-one".