1657424923 has 32 divisors (see below), whose sum is σ = 2124721152. Its totient is φ = 1255564800.

The previous prime is 1657424921. The next prime is 1657424927. The reversal of 1657424923 is 3294247561.

It is not a de Polignac number, because 1657424923 - 2¹ = 1657424921 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 1657424923.

It is not an unprimeable number, because it can be changed into a prime (1657424921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397015 + ... + 401167.

It is an arithmetic number, because the mean of its divisors is an integer number (66397536).

Almost surely, 2^1657424923 is an apocalyptic number.

1657424923 is a deficient number, since it is larger than the sum of its proper divisors (467296229).

1657424923 is a wasteful number, since it uses less digits than its factorization.

1657424923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315.

The product of its digits is 362880, while the sum is 43.

The square root of 1657424923 is about 40711.4839203879. The cubic root of 1657424923 is about 1183.4355786457.

The spelling of 1657424923 in words is "one billion, six hundred fifty-seven million, four hundred twenty-four thousand, nine hundred twenty-three".