72972719 has 4 divisors (see below), whose sum is σ = 73681296. Its totient is φ = 72264144.

The previous prime is 72972709. The next prime is 72972727. The reversal of 72972719 is 91727927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91727927 = 79 ⋅1161113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72972719 is a prime.

It is a super-2 number, since 2×72972719² = 10650035436505922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72972719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72972709) 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, 354134 + ... + 354339.

It is an arithmetic number, because the mean of its divisors is an integer number (18420324).

Almost surely, 2^72972719 is an apocalyptic number.

72972719 is a deficient number, since it is larger than the sum of its proper divisors (708577).

72972719 is a wasteful number, since it uses less digits than its factorization.

72972719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708576.

The product of its digits is 111132, while the sum is 44.

The square root of 72972719 is about 8542.4070963634. The cubic root of 72972719 is about 417.8818507985.

The spelling of 72972719 in words is "seventy-two million, nine hundred seventy-two thousand, seven hundred nineteen".