72163207 has 2 divisors, whose sum is σ = 72163208. Its totient is φ = 72163206.

The previous prime is 72163199. The next prime is 72163211. The reversal of 72163207 is 70236127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72163207 - 2³ = 72163199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72163237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081603 + 36081604.

It is an arithmetic number, because the mean of its divisors is an integer number (36081604).

Almost surely, 2^72163207 is an apocalyptic number.

72163207 is a deficient number, since it is larger than the sum of its proper divisors (1).

72163207 is an equidigital number, since it uses as much as digits as its factorization.

72163207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 72163207 is about 8494.8929952060. The cubic root of 72163207 is about 416.3308646593.

The spelling of 72163207 in words is "seventy-two million, one hundred sixty-three thousand, two hundred seven".