69990985 has 4 divisors (see below), whose sum is σ = 83989188. Its totient is φ = 55992784.

The previous prime is 69990959. The next prime is 69991027. The reversal of 69990985 is 58909996.

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 35569296 + 34421689 = 5964^2 + 5867^2 .

It is a cyclic number.

It is not a de Polignac number, because 69990985 - 2⁵ = 69990953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6999094 + ... + 6999103.

It is an arithmetic number, because the mean of its divisors is an integer number (20997297).

Almost surely, 2^69990985 is an apocalyptic number.

It is an amenable number.

69990985 is a deficient number, since it is larger than the sum of its proper divisors (13998203).

69990985 is a wasteful number, since it uses less digits than its factorization.

69990985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13998202.

The product of its (nonzero) digits is 1574640, while the sum is 55.

The square root of 69990985 is about 8366.0614986982. The cubic root of 69990985 is about 412.1108371323.

The spelling of 69990985 in words is "sixty-nine million, nine hundred ninety thousand, nine hundred eighty-five".