72353691 has 12 divisors (see below), whose sum is σ = 110011720. Its totient is φ = 45696960.

The previous prime is 72353669. The next prime is 72353693. The reversal of 72353691 is 19635327.

It is not a de Polignac number, because 72353691 - 2⁶ = 72353627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72353693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211390 + ... + 211731.

Almost surely, 2^72353691 is an apocalyptic number.

72353691 is a deficient number, since it is larger than the sum of its proper divisors (37658029).

72353691 is a wasteful number, since it uses less digits than its factorization.

72353691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423146 (or 423143 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 72353691 is about 8506.0972837136. The cubic root of 72353691 is about 416.6968623095.

The spelling of 72353691 in words is "seventy-two million, three hundred fifty-three thousand, six hundred ninety-one".