72798911 has 4 divisors (see below), whose sum is σ = 74347872. Its totient is φ = 71249952.

The previous prime is 72798907. The next prime is 72798941. The reversal of 72798911 is 11989727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72798911 - 2² = 72798907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72798941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774410 + ... + 774503.

It is an arithmetic number, because the mean of its divisors is an integer number (18586968).

Almost surely, 2^72798911 is an apocalyptic number.

72798911 is a deficient number, since it is larger than the sum of its proper divisors (1548961).

72798911 is a wasteful number, since it uses less digits than its factorization.

72798911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548960.

The product of its digits is 63504, while the sum is 44.

The square root of 72798911 is about 8532.2277864576. The cubic root of 72798911 is about 417.5498136984.

The spelling of 72798911 in words is "seventy-two million, seven hundred ninety-eight thousand, nine hundred eleven".