70999873 has 24 divisors (see below), whose sum is σ = 87464448. Its totient is φ = 57347136.

The previous prime is 70999867. The next prime is 70999897. The reversal of 70999873 is 37899907.

It is a de Polignac number, because none of the positive numbers 2^k-70999873 is a prime.

It is a super-2 number, since 2×70999873² = 10081963932032258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70999873.

It is not an unprimeable number, because it can be changed into a prime (70999843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81840 + ... + 82702.

It is an arithmetic number, because the mean of its divisors is an integer number (3644352).

Almost surely, 2^70999873 is an apocalyptic number.

70999873 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

70999873 is a deficient number, since it is larger than the sum of its proper divisors (16464575).

70999873 is a wasteful number, since it uses less digits than its factorization.

70999873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 70999873 is about 8426.1422371095. The cubic root of 70999873 is about 414.0815280483.

The spelling of 70999873 in words is "seventy million, nine hundred ninety-nine thousand, eight hundred seventy-three".