70872691 has 4 divisors (see below), whose sum is σ = 70966584. Its totient is φ = 70778800.

The previous prime is 70872689. The next prime is 70872701. The reversal of 70872691 is 19627807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19627807 = 41 ⋅478727.

It is a cyclic number.

It is not a de Polignac number, because 70872691 - 2¹ = 70872689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70872601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45805 + ... + 47326.

It is an arithmetic number, because the mean of its divisors is an integer number (17741646).

Almost surely, 2^70872691 is an apocalyptic number.

70872691 is a deficient number, since it is larger than the sum of its proper divisors (93893).

70872691 is an equidigital number, since it uses as much as digits as its factorization.

70872691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93892.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 70872691 is about 8418.5919844116. The cubic root of 70872691 is about 413.8341323301.

The spelling of 70872691 in words is "seventy million, eight hundred seventy-two thousand, six hundred ninety-one".