72872769 has 4 divisors (see below), whose sum is σ = 97163696. Its totient is φ = 48581844.

The previous prime is 72872753. The next prime is 72872777. The reversal of 72872769 is 96727827.

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 not a de Polignac number, because 72872769 - 2⁴ = 72872753 is a prime.

It is a super-2 number, since 2×72872769² = 10620880923454722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72872719) 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, 12145459 + ... + 12145464.

It is an arithmetic number, because the mean of its divisors is an integer number (24290924).

Almost surely, 2^72872769 is an apocalyptic number.

It is an amenable number.

72872769 is a deficient number, since it is larger than the sum of its proper divisors (24290927).

72872769 is a wasteful number, since it uses less digits than its factorization.

72872769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24290926.

The product of its digits is 592704, while the sum is 48.

The square root of 72872769 is about 8536.5548671581. The cubic root of 72872769 is about 417.6909741006.

The spelling of 72872769 in words is "seventy-two million, eight hundred seventy-two thousand, seven hundred sixty-nine".