72981719 has 8 divisors (see below), whose sum is σ = 77934720. Its totient is φ = 68191200.

The previous prime is 72981709. The next prime is 72981721. The reversal of 72981719 is 91718927.

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 72981719 - 2⁴ = 72981703 is a prime.

It is a super-2 number, since 2×72981719² = 10652662616389922, 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 72981719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72981709) 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, 39692 + ... + 41489.

It is an arithmetic number, because the mean of its divisors is an integer number (9741840).

Almost surely, 2^72981719 is an apocalyptic number.

72981719 is a deficient number, since it is larger than the sum of its proper divisors (4953001).

72981719 is a wasteful number, since it uses less digits than its factorization.

72981719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81241.

The product of its digits is 63504, while the sum is 44.

The square root of 72981719 is about 8542.9338637262. The cubic root of 72981719 is about 417.8990297393.

The spelling of 72981719 in words is "seventy-two million, nine hundred eighty-one thousand, seven hundred nineteen".