70991313 has 8 divisors (see below), whose sum is σ = 94723776. Its totient is φ = 47293200.

The previous prime is 70991287. The next prime is 70991329. The reversal of 70991313 is 31319907.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70991313 - 2⁵ = 70991281 is a prime.

It is a super-3 number, since 3×70991313³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (70991513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3298 + ... + 12363.

It is an arithmetic number, because the mean of its divisors is an integer number (11840472).

Almost surely, 2^70991313 is an apocalyptic number.

It is an amenable number.

70991313 is a deficient number, since it is larger than the sum of its proper divisors (23732463).

70991313 is a wasteful number, since it uses less digits than its factorization.

70991313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17175.

The product of its (nonzero) digits is 5103, while the sum is 33.

The square root of 70991313 is about 8425.6342787947. The cubic root of 70991313 is about 414.0648863268.

The spelling of 70991313 in words is "seventy million, nine hundred ninety-one thousand, three hundred thirteen".