72619391 has 16 divisors (see below), whose sum is σ = 81113088. Its totient is φ = 64562400.

The previous prime is 72619367. The next prime is 72619403. The reversal of 72619391 is 19391627.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72619391 - 2¹⁰ = 72618367 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72619321) 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, 147656 + ... + 148146.

It is an arithmetic number, because the mean of its divisors is an integer number (5069568).

Almost surely, 2^72619391 is an apocalyptic number.

72619391 is a deficient number, since it is larger than the sum of its proper divisors (8493697).

72619391 is a wasteful number, since it uses less digits than its factorization.

72619391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its digits is 20412, while the sum is 38.

The square root of 72619391 is about 8521.7011799288. The cubic root of 72619391 is about 417.2063092821.

The spelling of 72619391 in words is "seventy-two million, six hundred nineteen thousand, three hundred ninety-one".