72401279 has 2 divisors, whose sum is σ = 72401280. Its totient is φ = 72401278.

The previous prime is 72401261. The next prime is 72401281. The reversal of 72401279 is 97210427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72401279 - 2²⁰ = 71352703 is a prime.

Together with 72401281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72401239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36200639 + 36200640.

It is an arithmetic number, because the mean of its divisors is an integer number (36200640).

Almost surely, 2^72401279 is an apocalyptic number.

72401279 is a deficient number, since it is larger than the sum of its proper divisors (1).

72401279 is an equidigital number, since it uses as much as digits as its factorization.

72401279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 72401279 is about 8508.8941114577. The cubic root of 72401279 is about 416.7881980067.

The spelling of 72401279 in words is "seventy-two million, four hundred one thousand, two hundred seventy-nine".