72393687 has 6 divisors (see below), whose sum is σ = 104568672. Its totient is φ = 48262452.

The previous prime is 72393661. The next prime is 72393689. The reversal of 72393687 is 78639327.

It is a happy number.

It is not a de Polignac number, because 72393687 - 2⁶ = 72393623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72393689) 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 5 ways as a sum of consecutive naturals, for example, 4021863 + ... + 4021880.

It is an arithmetic number, because the mean of its divisors is an integer number (17428112).

Almost surely, 2^72393687 is an apocalyptic number.

72393687 is a deficient number, since it is larger than the sum of its proper divisors (32174985).

72393687 is a wasteful number, since it uses less digits than its factorization.

72393687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043749 (or 8043746 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 72393687 is about 8508.4479783331. The cubic root of 72393687 is about 416.7736293570.

The spelling of 72393687 in words is "seventy-two million, three hundred ninety-three thousand, six hundred eighty-seven".