72634997 has 2 divisors, whose sum is σ = 72634998. Its totient is φ = 72634996.

The previous prime is 72634987. The next prime is 72635009. The reversal of 72634997 is 79943627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72607441 + 27556 = 8521^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 72634997 - 2⁸ = 72634741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72634987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36317498 + 36317499.

It is an arithmetic number, because the mean of its divisors is an integer number (36317499).

Almost surely, 2^72634997 is an apocalyptic number.

It is an amenable number.

72634997 is a deficient number, since it is larger than the sum of its proper divisors (1).

72634997 is an equidigital number, since it uses as much as digits as its factorization.

72634997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 47.

The square root of 72634997 is about 8522.6167929809. The cubic root of 72634997 is about 417.2361931980.

The spelling of 72634997 in words is "seventy-two million, six hundred thirty-four thousand, nine hundred ninety-seven".