70724317 has 4 divisors (see below), whose sum is σ = 70741440. Its totient is φ = 70707196.

The previous prime is 70724309. The next prime is 70724321. The reversal of 70724317 is 71342707.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71342707 = 2389 ⋅29863.

It is a cyclic number.

It is not a de Polignac number, because 70724317 - 2³ = 70724309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70724377) 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, 1878 + ... + 12040.

It is an arithmetic number, because the mean of its divisors is an integer number (17685360).

Almost surely, 2^70724317 is an apocalyptic number.

It is an amenable number.

70724317 is a deficient number, since it is larger than the sum of its proper divisors (17123).

70724317 is a wasteful number, since it uses less digits than its factorization.

70724317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17122.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 70724317 is about 8409.7750861720. The cubic root of 70724317 is about 413.5451393781.

The spelling of 70724317 in words is "seventy million, seven hundred twenty-four thousand, three hundred seventeen".