70131887 has 6 divisors (see below), whose sum is σ = 81582048. Its totient is φ = 60113004.

The previous prime is 70131857. The next prime is 70131913. The reversal of 70131887 is 78813107.

It is not a de Polignac number, because 70131887 - 2⁸ = 70131631 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 (70131847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715583 + ... + 715680.

It is an arithmetic number, because the mean of its divisors is an integer number (13597008).

Almost surely, 2^70131887 is an apocalyptic number.

70131887 is a deficient number, since it is larger than the sum of its proper divisors (11450161).

70131887 is a wasteful number, since it uses less digits than its factorization.

70131887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431277 (or 1431270 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 70131887 is about 8374.4783121100. The cubic root of 70131887 is about 412.3871980511.

The spelling of 70131887 in words is "seventy million, one hundred thirty-one thousand, eight hundred eighty-seven".