70199991 has 6 divisors (see below), whose sum is σ = 101400000. Its totient is φ = 46799988.

The previous prime is 70199971. The next prime is 70199993. The reversal of 70199991 is 19999107.

It is not a de Polignac number, because 70199991 - 2⁷ = 70199863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70199993) 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, 3899991 + ... + 3900008.

It is an arithmetic number, because the mean of its divisors is an integer number (16900000).

Almost surely, 2^70199991 is an apocalyptic number.

70199991 is a deficient number, since it is larger than the sum of its proper divisors (31200009).

70199991 is a wasteful number, since it uses less digits than its factorization.

70199991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7800005 (or 7800002 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 45.

The square root of 70199991 is about 8378.5434891752. The cubic root of 70199991 is about 412.5206424932.

The spelling of 70199991 in words is "seventy million, one hundred ninety-nine thousand, nine hundred ninety-one".