72164403 has 12 divisors (see below), whose sum is σ = 105947088. Its totient is φ = 47320560.

The previous prime is 72164401. The next prime is 72164423. The reversal of 72164403 is 30446127.

72164403 is a `hidden beast` number, since 7 + 216 + 440 + 3 = 666.

It is not a de Polignac number, because 72164403 - 2¹ = 72164401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72164401) 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, 65175 + ... + 66272.

It is an arithmetic number, because the mean of its divisors is an integer number (8828924).

Almost surely, 2^72164403 is an apocalyptic number.

72164403 is a deficient number, since it is larger than the sum of its proper divisors (33782685).

72164403 is a wasteful number, since it uses less digits than its factorization.

72164403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131514 (or 131511 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 72164403 is about 8494.9633901507. The cubic root of 72164403 is about 416.3331646724. Note that the first 3 decimals are identical.

The spelling of 72164403 in words is "seventy-two million, one hundred sixty-four thousand, four hundred three".