69957985 has 4 divisors (see below), whose sum is σ = 83949588. Its totient is φ = 55966384.

The previous prime is 69957977. The next prime is 69958003. The reversal of 69957985 is 58975996.

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 52519009 + 17438976 = 7247^2 + 4176^2 .

It is a cyclic number.

It is not a de Polignac number, because 69957985 - 2³ = 69957977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6995794 + ... + 6995803.

It is an arithmetic number, because the mean of its divisors is an integer number (20987397).

Almost surely, 2^69957985 is an apocalyptic number.

It is an amenable number.

69957985 is a deficient number, since it is larger than the sum of its proper divisors (13991603).

69957985 is a wasteful number, since it uses less digits than its factorization.

69957985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13991602.

The product of its digits is 6123600, while the sum is 58.

The square root of 69957985 is about 8364.0890119606. The cubic root of 69957985 is about 412.0460583347.

The spelling of 69957985 in words is "sixty-nine million, nine hundred fifty-seven thousand, nine hundred eighty-five".