822425657 has 2 divisors, whose sum is σ = 822425658. Its totient is φ = 822425656.

The previous prime is 822425579. The next prime is 822425663. The reversal of 822425657 is 756524228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460703296 + 361722361 = 21464^2 + 19019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-822425657 is a prime.

It is a super-2 number, since 2×822425657² = 1352767922583763298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (822425687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411212828 + 411212829.

It is an arithmetic number, because the mean of its divisors is an integer number (411212829).

Almost surely, 2^822425657 is an apocalyptic number.

It is an amenable number.

822425657 is a deficient number, since it is larger than the sum of its proper divisors (1).

822425657 is an equidigital number, since it uses as much as digits as its factorization.

822425657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 41.

The square root of 822425657 is about 28677.9646592990. The cubic root of 822425657 is about 936.9121769750.

The spelling of 822425657 in words is "eight hundred twenty-two million, four hundred twenty-five thousand, six hundred fifty-seven".