63693985 has 16 divisors (see below), whose sum is σ = 85190400. Its totient is φ = 45432576.

The previous prime is 63693941. The next prime is 63694003. The reversal of 63693985 is 58939636.

It is a cyclic number.

It is not a de Polignac number, because 63693985 - 2²⁵ = 30139553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18105 + ... + 21334.

It is an arithmetic number, because the mean of its divisors is an integer number (5324400).

Almost surely, 2^63693985 is an apocalyptic number.

It is an amenable number.

63693985 is a deficient number, since it is larger than the sum of its proper divisors (21496415).

63693985 is a wasteful number, since it uses less digits than its factorization.

63693985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39480.

The product of its digits is 1049760, while the sum is 49.

The square root of 63693985 is about 7980.8511450847. The cubic root of 63693985 is about 399.3614499269.

The spelling of 63693985 in words is "sixty-three million, six hundred ninety-three thousand, nine hundred eighty-five".