72206507 has 2 divisors, whose sum is σ = 72206508. Its totient is φ = 72206506.

The previous prime is 72206483. The next prime is 72206513. The reversal of 72206507 is 70560227.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72206507 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72206507.

It is not a weakly prime, because it can be changed into another prime (72206527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36103253 + 36103254.

It is an arithmetic number, because the mean of its divisors is an integer number (36103254).

Almost surely, 2^72206507 is an apocalyptic number.

72206507 is a deficient number, since it is larger than the sum of its proper divisors (1).

72206507 is an equidigital number, since it uses as much as digits as its factorization.

72206507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72206507 is about 8497.4412030917. The cubic root of 72206507 is about 416.4141181749.

The spelling of 72206507 in words is "seventy-two million, two hundred six thousand, five hundred seven".