72758669 has 2 divisors, whose sum is σ = 72758670. Its totient is φ = 72758668.

The previous prime is 72758659. The next prime is 72758671. The reversal of 72758669 is 96685727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36602500 + 36156169 = 6050^2 + 6013^2 .

It is a cyclic number.

It is not a de Polignac number, because 72758669 - 2¹² = 72754573 is a prime.

It is a super-2 number, since 2×72758669² = 10587647829303122, which contains 22 as substring.

Together with 72758671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72758659) 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, 36379334 + 36379335.

It is an arithmetic number, because the mean of its divisors is an integer number (36379335).

Almost surely, 2^72758669 is an apocalyptic number.

It is an amenable number.

72758669 is a deficient number, since it is larger than the sum of its proper divisors (1).

72758669 is an equidigital number, since it uses as much as digits as its factorization.

72758669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 72758669 is about 8529.8692252578. The cubic root of 72758669 is about 417.4728613720.

The spelling of 72758669 in words is "seventy-two million, seven hundred fifty-eight thousand, six hundred sixty-nine".