72768061 has 2 divisors, whose sum is σ = 72768062. Its totient is φ = 72768060.

The previous prime is 72768023. The next prime is 72768127. The reversal of 72768061 is 16086727.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72352036 + 416025 = 8506^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 72768061 - 2²³ = 64379453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72768061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72768001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36384030 + 36384031.

It is an arithmetic number, because the mean of its divisors is an integer number (36384031).

Almost surely, 2^72768061 is an apocalyptic number.

It is an amenable number.

72768061 is a deficient number, since it is larger than the sum of its proper divisors (1).

72768061 is an equidigital number, since it uses as much as digits as its factorization.

72768061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 72768061 is about 8530.4197434827. The cubic root of 72768061 is about 417.4908236596.

The spelling of 72768061 in words is "seventy-two million, seven hundred sixty-eight thousand, sixty-one".