72070613 has 4 divisors (see below), whose sum is σ = 72512928. Its totient is φ = 71628300.

The previous prime is 72070601. The next prime is 72070657. The reversal of 72070613 is 31607027.

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.

It is a cyclic number.

It is not a de Polignac number, because 72070613 - 2¹⁰ = 72069589 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 (72070213) 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, 220913 + ... + 221238.

It is an arithmetic number, because the mean of its divisors is an integer number (18128232).

Almost surely, 2^72070613 is an apocalyptic number.

It is an amenable number.

72070613 is a deficient number, since it is larger than the sum of its proper divisors (442315).

72070613 is a wasteful number, since it uses less digits than its factorization.

72070613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442314.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 72070613 is about 8489.4412654780. The cubic root of 72070613 is about 416.1527210622.

The spelling of 72070613 in words is "seventy-two million, seventy thousand, six hundred thirteen".