72987679 has 2 divisors, whose sum is σ = 72987680. Its totient is φ = 72987678.

The previous prime is 72987653. The next prime is 72987689. The reversal of 72987679 is 97678927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72987679 - 2¹⁷ = 72856607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72987619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36493839 + 36493840.

It is an arithmetic number, because the mean of its divisors is an integer number (36493840).

Almost surely, 2^72987679 is an apocalyptic number.

72987679 is a deficient number, since it is larger than the sum of its proper divisors (1).

72987679 is an equidigital number, since it uses as much as digits as its factorization.

72987679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 55.

The square root of 72987679 is about 8543.2826829036. The cubic root of 72987679 is about 417.9104052383.

The spelling of 72987679 in words is "seventy-two million, nine hundred eighty-seven thousand, six hundred seventy-nine".