63420657 has 8 divisors (see below), whose sum is σ = 86527584. Its totient is φ = 41297088.

The previous prime is 63420653. The next prime is 63420673. The reversal of 63420657 is 75602436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63420657 - 2² = 63420653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63420653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245688 + ... + 245945.

It is an arithmetic number, because the mean of its divisors is an integer number (10815948).

Almost surely, 2^63420657 is an apocalyptic number.

It is an amenable number.

63420657 is a deficient number, since it is larger than the sum of its proper divisors (23106927).

63420657 is a wasteful number, since it uses less digits than its factorization.

63420657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491679.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 63420657 is about 7963.7087465577. The cubic root of 63420657 is about 398.7893750814.

The spelling of 63420657 in words is "sixty-three million, four hundred twenty thousand, six hundred fifty-seven".