429123657 has 4 divisors (see below), whose sum is σ = 572164880. Its totient is φ = 286082436.

The previous prime is 429123641. The next prime is 429123661. The reversal of 429123657 is 756321924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 429123657 - 2⁴ = 429123641 is a prime.

It is a super-2 number, since 2×429123657² = 368294225994107298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (429123637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71520607 + ... + 71520612.

It is an arithmetic number, because the mean of its divisors is an integer number (143041220).

Almost surely, 2^429123657 is an apocalyptic number.

It is an amenable number.

429123657 is a deficient number, since it is larger than the sum of its proper divisors (143041223).

429123657 is a wasteful number, since it uses less digits than its factorization.

429123657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143041222.

The product of its digits is 90720, while the sum is 39.

The square root of 429123657 is about 20715.3000702379. The cubic root of 429123657 is about 754.2711308600.

The spelling of 429123657 in words is "four hundred twenty-nine million, one hundred twenty-three thousand, six hundred fifty-seven".