69638985 has 36 divisors (see below), whose sum is σ = 130721292. Its totient is φ = 34280064.

The previous prime is 69638983. The next prime is 69638993. The reversal of 69638985 is 58983696.

It can be written as a sum of positive squares in 6 ways, for example, as 26749584 + 42889401 = 5172^2 + 6549^2 .

It is not a de Polignac number, because 69638985 - 2¹ = 69638983 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (69638983) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3027 + ... + 12183.

It is an arithmetic number, because the mean of its divisors is an integer number (3631147).

Almost surely, 2^69638985 is an apocalyptic number.

69638985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

69638985 is a deficient number, since it is larger than the sum of its proper divisors (61082307).

69638985 is a wasteful number, since it uses less digits than its factorization.

69638985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9194 (or 9178 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 69638985 is about 8344.9976033550. The cubic root of 69638985 is about 411.4188104806.

The spelling of 69638985 in words is "sixty-nine million, six hundred thirty-eight thousand, nine hundred eighty-five".