72549619 has 16 divisors (see below), whose sum is σ = 79437600. Its totient is φ = 65995776.

The previous prime is 72549599. The next prime is 72549649. The reversal of 72549619 is 91694527.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72549619 - 2¹¹ = 72547571 is a prime.

It is a super-2 number, since 2×72549619² = 10526894434090322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72549649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194317 + ... + 194689.

It is an arithmetic number, because the mean of its divisors is an integer number (4964850).

Almost surely, 2^72549619 is an apocalyptic number.

72549619 is a deficient number, since it is larger than the sum of its proper divisors (6887981).

72549619 is a wasteful number, since it uses less digits than its factorization.

72549619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its digits is 136080, while the sum is 43.

The square root of 72549619 is about 8517.6064126021. The cubic root of 72549619 is about 417.0726505543.

The spelling of 72549619 in words is "seventy-two million, five hundred forty-nine thousand, six hundred nineteen".