72698779 has 2 divisors, whose sum is σ = 72698780. Its totient is φ = 72698778.

The previous prime is 72698753. The next prime is 72698803. The reversal of 72698779 is 97789627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72698779 - 2⁹ = 72698267 is a prime.

It is a super-2 number, since 2×72698779² = 10570224936181682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72698719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36349389 + 36349390.

It is an arithmetic number, because the mean of its divisors is an integer number (36349390).

Almost surely, 2^72698779 is an apocalyptic number.

72698779 is a deficient number, since it is larger than the sum of its proper divisors (1).

72698779 is an equidigital number, since it uses as much as digits as its factorization.

72698779 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 72698779 is about 8526.3578977193. The cubic root of 72698779 is about 417.3582848170.

The spelling of 72698779 in words is "seventy-two million, six hundred ninety-eight thousand, seven hundred seventy-nine".