72997207 has 2 divisors, whose sum is σ = 72997208. Its totient is φ = 72997206.

The previous prime is 72997129. The next prime is 72997229. The reversal of 72997207 is 70279927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72997207 - 2¹¹ = 72995159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72997277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36498603 + 36498604.

It is an arithmetic number, because the mean of its divisors is an integer number (36498604).

Almost surely, 2^72997207 is an apocalyptic number.

72997207 is a deficient number, since it is larger than the sum of its proper divisors (1).

72997207 is an equidigital number, since it uses as much as digits as its factorization.

72997207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 72997207 is about 8543.8402957921. The cubic root of 72997207 is about 417.9285894814.

The spelling of 72997207 in words is "seventy-two million, nine hundred ninety-seven thousand, two hundred seven".