72620969 has 4 divisors (see below), whose sum is σ = 74166144. Its totient is φ = 71075796.

The previous prime is 72620939. The next prime is 72620981. The reversal of 72620969 is 96902627.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-72620969 is a prime.

It is a super-2 number, since 2×72620969² = 10547610276997922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72620939) 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, 772517 + ... + 772610.

It is an arithmetic number, because the mean of its divisors is an integer number (18541536).

Almost surely, 2^72620969 is an apocalyptic number.

It is an amenable number.

72620969 is a deficient number, since it is larger than the sum of its proper divisors (1545175).

72620969 is a wasteful number, since it uses less digits than its factorization.

72620969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545174.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 72620969 is about 8521.7937665729. The cubic root of 72620969 is about 417.2093311875.

The spelling of 72620969 in words is "seventy-two million, six hundred twenty thousand, nine hundred sixty-nine".