70872313 has 4 divisors (see below), whose sum is σ = 72600948. Its totient is φ = 69143680.

The previous prime is 70872311. The next prime is 70872323. The reversal of 70872313 is 31327807.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39601849 + 31270464 = 6293^2 + 5592^2 .

It is a cyclic number.

It is not a de Polignac number, because 70872313 - 2¹ = 70872311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70872311) 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, 864256 + ... + 864337.

It is an arithmetic number, because the mean of its divisors is an integer number (18150237).

Almost surely, 2^70872313 is an apocalyptic number.

It is an amenable number.

70872313 is a deficient number, since it is larger than the sum of its proper divisors (1728635).

70872313 is a wasteful number, since it uses less digits than its factorization.

70872313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728634.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 70872313 is about 8418.5695340717. The cubic root of 70872313 is about 413.8333965997.

The spelling of 70872313 in words is "seventy million, eight hundred seventy-two thousand, three hundred thirteen".