72670517 has 8 divisors (see below), whose sum is σ = 73554624. Its totient is φ = 71790048.

The previous prime is 72670511. The next prime is 72670519. The reversal of 72670517 is 71507627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72670517 - 2¹⁶ = 72604981 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 (72670511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69833 + ... + 70865.

It is an arithmetic number, because the mean of its divisors is an integer number (9194328).

Almost surely, 2^72670517 is an apocalyptic number.

It is an amenable number.

72670517 is a deficient number, since it is larger than the sum of its proper divisors (884107).

72670517 is a wasteful number, since it uses less digits than its factorization.

72670517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 72670517 is about 8524.7004052928. The cubic root of 72670517 is about 417.3041944602.

The spelling of 72670517 in words is "seventy-two million, six hundred seventy thousand, five hundred seventeen".