72079457 has 4 divisors (see below), whose sum is σ = 72097200. Its totient is φ = 72061716.

The previous prime is 72079453. The next prime is 72079459. The reversal of 72079457 is 75497027.

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: 75497027 = 173 ⋅436399.

It is a cyclic number.

It is not a de Polignac number, because 72079457 - 2² = 72079453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72079453) 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, 578 + ... + 12020.

It is an arithmetic number, because the mean of its divisors is an integer number (18024300).

Almost surely, 2^72079457 is an apocalyptic number.

It is an amenable number.

72079457 is a deficient number, since it is larger than the sum of its proper divisors (17743).

72079457 is a wasteful number, since it uses less digits than its factorization.

72079457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17742.

The product of its (nonzero) digits is 123480, while the sum is 41.

The square root of 72079457 is about 8489.9621318355. The cubic root of 72079457 is about 416.1697428134.

The spelling of 72079457 in words is "seventy-two million, seventy-nine thousand, four hundred fifty-seven".