72130633 has 2 divisors, whose sum is σ = 72130634. Its totient is φ = 72130632.

The previous prime is 72130613. The next prime is 72130687. The reversal of 72130633 is 33603127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46607929 + 25522704 = 6827^2 + 5052^2 .

It is a cyclic number.

It is not a de Polignac number, because 72130633 - 2¹³ = 72122441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72130598 and 72130607.

It is not a weakly prime, because it can be changed into another prime (72130613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36065316 + 36065317.

It is an arithmetic number, because the mean of its divisors is an integer number (36065317).

Almost surely, 2^72130633 is an apocalyptic number.

It is an amenable number.

72130633 is a deficient number, since it is larger than the sum of its proper divisors (1).

72130633 is an equidigital number, since it uses as much as digits as its factorization.

72130633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 72130633 is about 8492.9755092076. The cubic root of 72130633 is about 416.2682122210.

The spelling of 72130633 in words is "seventy-two million, one hundred thirty thousand, six hundred thirty-three".