72922509 has 24 divisors (see below), whose sum is σ = 118619904. Its totient is φ = 42768000.

The previous prime is 72922483. The next prime is 72922519. The reversal of 72922509 is 90522927.

It is not a de Polignac number, because 72922509 - 2⁹ = 72921997 is a prime.

It is a super-3 number, since 3×72922509³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72922519) 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 23 ways as a sum of consecutive naturals, for example, 8812 + ... + 14949.

It is an arithmetic number, because the mean of its divisors is an integer number (4942496).

Almost surely, 2^72922509 is an apocalyptic number.

It is an amenable number.

72922509 is a deficient number, since it is larger than the sum of its proper divisors (45697395).

72922509 is a wasteful number, since it uses less digits than its factorization.

72922509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809 (or 23806 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 72922509 is about 8539.4677234591. The cubic root of 72922509 is about 417.7859854663.

It can be divided in two parts, 7292 and 2509, that added together give a square (9801 = 99²).

The spelling of 72922509 in words is "seventy-two million, nine hundred twenty-two thousand, five hundred nine".