72798749 has 4 divisors (see below), whose sum is σ = 75963936. Its totient is φ = 69633564.

The previous prime is 72798727. The next prime is 72798769. The reversal of 72798749 is 94789727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72798749 - 2¹² = 72794653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72798749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72798769) 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 in 3 ways as a sum of consecutive naturals, for example, 1582559 + ... + 1582604.

It is an arithmetic number, because the mean of its divisors is an integer number (18990984).

Almost surely, 2^72798749 is an apocalyptic number.

It is an amenable number.

72798749 is a deficient number, since it is larger than the sum of its proper divisors (3165187).

72798749 is a wasteful number, since it uses less digits than its factorization.

72798749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165186.

The product of its digits is 1778112, while the sum is 53.

The square root of 72798749 is about 8532.2182930349. The cubic root of 72798749 is about 417.5495039726.

The spelling of 72798749 in words is "seventy-two million, seven hundred ninety-eight thousand, seven hundred forty-nine".