72921069 has 24 divisors (see below), whose sum is σ = 119406560. Its totient is φ = 42511392.

The previous prime is 72921049. The next prime is 72921073. The reversal of 72921069 is 96012927.

It is not a de Polignac number, because 72921069 - 2¹³ = 72912877 is a prime.

It is a super-2 number, since 2×72921069² = 10634964608205522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72921049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14179 + ... + 18624.

Almost surely, 2^72921069 is an apocalyptic number.

It is an amenable number.

72921069 is a deficient number, since it is larger than the sum of its proper divisors (46485491).

72921069 is a wasteful number, since it uses less digits than its factorization.

72921069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32841 (or 32838 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 72921069 is about 8539.3834086543. The cubic root of 72921069 is about 417.7832354430.

The spelling of 72921069 in words is "seventy-two million, nine hundred twenty-one thousand, sixty-nine".