72756433 has 2 divisors, whose sum is σ = 72756434. Its totient is φ = 72756432.

The previous prime is 72756421. The next prime is 72756449. The reversal of 72756433 is 33465727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55175184 + 17581249 = 7428^2 + 4193^2 .

It is a cyclic number.

It is not a de Polignac number, because 72756433 - 2⁵ = 72756401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72756392 and 72756401.

It is not a weakly prime, because it can be changed into another prime (72759433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36378216 + 36378217.

It is an arithmetic number, because the mean of its divisors is an integer number (36378217).

Almost surely, 2^72756433 is an apocalyptic number.

It is an amenable number.

72756433 is a deficient number, since it is larger than the sum of its proper divisors (1).

72756433 is an equidigital number, since it uses as much as digits as its factorization.

72756433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 37.

The square root of 72756433 is about 8529.7381554184. The cubic root of 72756433 is about 417.4685847733.

The spelling of 72756433 in words is "seventy-two million, seven hundred fifty-six thousand, four hundred thirty-three".