63670613 has 4 divisors (see below), whose sum is σ = 64135500. Its totient is φ = 63205728.

The previous prime is 63670609. The next prime is 63670619. The reversal of 63670613 is 31607636.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24820324 + 38850289 = 4982^2 + 6233^2 .

It is a cyclic number.

It is not a de Polignac number, because 63670613 - 2² = 63670609 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 63670613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63670619) 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, 232238 + ... + 232511.

It is an arithmetic number, because the mean of its divisors is an integer number (16033875).

Almost surely, 2^63670613 is an apocalyptic number.

It is an amenable number.

63670613 is a deficient number, since it is larger than the sum of its proper divisors (464887).

63670613 is a wasteful number, since it uses less digits than its factorization.

63670613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464886.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 63670613 is about 7979.3867558854. The cubic root of 63670613 is about 399.3125964509.

The spelling of 63670613 in words is "sixty-three million, six hundred seventy thousand, six hundred thirteen".