72615443 has 4 divisors (see below), whose sum is σ = 73294200. Its totient is φ = 71936688.

The previous prime is 72615427. The next prime is 72615451. The reversal of 72615443 is 34451627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72615443 - 2⁴ = 72615427 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (72615493) 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, 339218 + ... + 339431.

It is an arithmetic number, because the mean of its divisors is an integer number (18323550).

Almost surely, 2^72615443 is an apocalyptic number.

72615443 is a deficient number, since it is larger than the sum of its proper divisors (678757).

72615443 is a wasteful number, since it uses less digits than its factorization.

72615443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678756.

The product of its digits is 20160, while the sum is 32.

The square root of 72615443 is about 8521.4695328916. The cubic root of 72615443 is about 417.1987485818.

The spelling of 72615443 in words is "seventy-two million, six hundred fifteen thousand, four hundred forty-three".