42992657 has 2 divisors, whose sum is σ = 42992658. Its totient is φ = 42992656.

The previous prime is 42992633. The next prime is 42992659. The reversal of 42992657 is 75629924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42627841 + 364816 = 6529^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 42992657 - 2²⁰ = 41944081 is a prime.

Together with 42992659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42992659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21496328 + 21496329.

It is an arithmetic number, because the mean of its divisors is an integer number (21496329).

Almost surely, 2^42992657 is an apocalyptic number.

It is an amenable number.

42992657 is a deficient number, since it is larger than the sum of its proper divisors (1).

42992657 is an equidigital number, since it uses as much as digits as its factorization.

42992657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 42992657 is about 6556.8786018959. The cubic root of 42992657 is about 350.3198626926.

The spelling of 42992657 in words is "forty-two million, nine hundred ninety-two thousand, six hundred fifty-seven".