42923657 has 18 divisors (see below), whose sum is σ = 53102682. Its totient is φ = 34474944.

The previous prime is 42923651. The next prime is 42923659. The reversal of 42923657 is 75632924.

It can be written as a sum of positive squares in only one way, i.e., 40398736 + 2524921 = 6356^2 + 1589^2 .

It is not a de Polignac number, because 42923657 - 2⁸ = 42923401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42923657.

It is not an unprimeable number, because it can be changed into a prime (42923651) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 188978 + ... + 189204.

It is an arithmetic number, because the mean of its divisors is an integer number (2950149).

Almost surely, 2^42923657 is an apocalyptic number.

It is an amenable number.

42923657 is a deficient number, since it is larger than the sum of its proper divisors (10179025).

42923657 is an equidigital number, since it uses as much as digits as its factorization.

42923657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 251 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 42923657 is about 6551.6148391065. The cubic root of 42923657 is about 350.1323499465.

The spelling of 42923657 in words is "forty-two million, nine hundred twenty-three thousand, six hundred fifty-seven".