72164503 has 2 divisors, whose sum is σ = 72164504. Its totient is φ = 72164502.

The previous prime is 72164483. The next prime is 72164509. The reversal of 72164503 is 30546127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72164503 - 2¹³ = 72156311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72164509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36082251 + 36082252.

It is an arithmetic number, because the mean of its divisors is an integer number (36082252).

Almost surely, 2^72164503 is an apocalyptic number.

72164503 is a deficient number, since it is larger than the sum of its proper divisors (1).

72164503 is an equidigital number, since it uses as much as digits as its factorization.

72164503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 72164503 is about 8494.9692759892. The cubic root of 72164503 is about 416.3333569800. Note that the first 4 decimals are identical.

The spelling of 72164503 in words is "seventy-two million, one hundred sixty-four thousand, five hundred three".