72329722 has 4 divisors (see below), whose sum is σ = 108494586. Its totient is φ = 36164860.

The previous prime is 72329717. The next prime is 72329731. The reversal of 72329722 is 22792327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22792327 = 167 ⋅136481.

It can be written as a sum of positive squares in only one way, i.e., 72233001 + 96721 = 8499^2 + 311^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18082429 + ... + 18082432.

Almost surely, 2^72329722 is an apocalyptic number.

72329722 is a deficient number, since it is larger than the sum of its proper divisors (36164864).

72329722 is a wasteful number, since it uses less digits than its factorization.

72329722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36164863.

The product of its digits is 21168, while the sum is 34.

The square root of 72329722 is about 8504.6882364964. The cubic root of 72329722 is about 416.6508434169.

The spelling of 72329722 in words is "seventy-two million, three hundred twenty-nine thousand, seven hundred twenty-two".