70131999 has 16 divisors (see below), whose sum is σ = 107113472. Its totient is φ = 39983328.

The previous prime is 70131977. The next prime is 70132003. The reversal of 70131999 is 99913107.

It is not a de Polignac number, because 70131999 - 2⁵ = 70131967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70131499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6117 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (6694592).

Almost surely, 2^70131999 is an apocalyptic number.

70131999 is a deficient number, since it is larger than the sum of its proper divisors (36981473).

70131999 is a wasteful number, since it uses less digits than its factorization.

70131999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7686.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 70131999 is about 8374.4849990910. The cubic root of 70131999 is about 412.3874175772.

The spelling of 70131999 in words is "seventy million, one hundred thirty-one thousand, nine hundred ninety-nine".