72981367 has 2 divisors, whose sum is σ = 72981368. Its totient is φ = 72981366.

The previous prime is 72981341. The next prime is 72981379. The reversal of 72981367 is 76318927.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72981367 - 2¹⁵ = 72948599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72981317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36490683 + 36490684.

It is an arithmetic number, because the mean of its divisors is an integer number (36490684).

Almost surely, 2^72981367 is an apocalyptic number.

72981367 is a deficient number, since it is larger than the sum of its proper divisors (1).

72981367 is an equidigital number, since it uses as much as digits as its factorization.

72981367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 72981367 is about 8542.9132618797. The cubic root of 72981367 is about 417.8983578784.

The spelling of 72981367 in words is "seventy-two million, nine hundred eighty-one thousand, three hundred sixty-seven".