72642797 has 2 divisors, whose sum is σ = 72642798. Its totient is φ = 72642796.

The previous prime is 72642737. The next prime is 72642821. The reversal of 72642797 is 79724627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 1510441 = 8434^2 + 1229^2 .

72642797 is a truncatable prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72642797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72642737) 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, 36321398 + 36321399.

It is an arithmetic number, because the mean of its divisors is an integer number (36321399).

Almost surely, 2^72642797 is an apocalyptic number.

It is an amenable number.

72642797 is a deficient number, since it is larger than the sum of its proper divisors (1).

72642797 is an equidigital number, since it uses as much as digits as its factorization.

72642797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 44.

The square root of 72642797 is about 8523.0743866283. The cubic root of 72642797 is about 417.2511278069.

The spelling of 72642797 in words is "seventy-two million, six hundred forty-two thousand, seven hundred ninety-seven".