72071579 has 4 divisors (see below), whose sum is σ = 75864840. Its totient is φ = 68278320.

The previous prime is 72071557. The next prime is 72071599. The reversal of 72071579 is 97517027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97517027 = 673 ⋅144899.

It is a cyclic number.

It is not a de Polignac number, because 72071579 - 2²⁰ = 71023003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72071599) 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, 1896602 + ... + 1896639.

It is an arithmetic number, because the mean of its divisors is an integer number (18966210).

Almost surely, 2^72071579 is an apocalyptic number.

72071579 is a deficient number, since it is larger than the sum of its proper divisors (3793261).

72071579 is a wasteful number, since it uses less digits than its factorization.

72071579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793260.

The product of its (nonzero) digits is 30870, while the sum is 38.

The square root of 72071579 is about 8489.4981594909. The cubic root of 72071579 is about 416.1545803579.

The spelling of 72071579 in words is "seventy-two million, seventy-one thousand, five hundred seventy-nine".