72122719 has 2 divisors, whose sum is σ = 72122720. Its totient is φ = 72122718.

The previous prime is 72122711. The next prime is 72122761. The reversal of 72122719 is 91722127.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72122719 - 2³ = 72122711 is a prime.

It is a super-2 number, since 2×72122719² = 10403373191905922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72122711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36061359 + 36061360.

It is an arithmetic number, because the mean of its divisors is an integer number (36061360).

Almost surely, 2^72122719 is an apocalyptic number.

72122719 is a deficient number, since it is larger than the sum of its proper divisors (1).

72122719 is an equidigital number, since it uses as much as digits as its factorization.

72122719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 31.

The square root of 72122719 is about 8492.5095819787. The cubic root of 72122719 is about 416.2529876810.

The spelling of 72122719 in words is "seventy-two million, one hundred twenty-two thousand, seven hundred nineteen".