487457657 has 4 divisors (see below), whose sum is σ = 488216400. Its totient is φ = 486698916.

The previous prime is 487457639. The next prime is 487457693. The reversal of 487457657 is 756754784.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 487457657 - 2⁸ = 487457401 is a prime.

It is a super-2 number, since 2×487457657² = 475229934735859298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 487457599 and 487457608.

It is not an unprimeable number, because it can be changed into a prime (487457617) 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, 378407 + ... + 379692.

It is an arithmetic number, because the mean of its divisors is an integer number (122054100).

Almost surely, 2^487457657 is an apocalyptic number.

It is an amenable number.

487457657 is a deficient number, since it is larger than the sum of its proper divisors (758743).

487457657 is an equidigital number, since it uses as much as digits as its factorization.

487457657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758742.

The product of its digits is 6585600, while the sum is 53.

The square root of 487457657 is about 22078.4432648681. The cubic root of 487457657 is about 787.0076711734.

The spelling of 487457657 in words is "four hundred eighty-seven million, four hundred fifty-seven thousand, six hundred fifty-seven".