72179633 has 2 divisors, whose sum is σ = 72179634. Its totient is φ = 72179632.

The previous prime is 72179629. The next prime is 72179641. The reversal of 72179633 is 33697127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 7907344 = 8017^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 72179633 - 2² = 72179629 is a prime.

It is not a weakly prime, because it can be changed into another prime (72179663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36089816 + 36089817.

It is an arithmetic number, because the mean of its divisors is an integer number (36089817).

Almost surely, 2^72179633 is an apocalyptic number.

It is an amenable number.

72179633 is a deficient number, since it is larger than the sum of its proper divisors (1).

72179633 is an equidigital number, since it uses as much as digits as its factorization.

72179633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 38.

The square root of 72179633 is about 8495.8597563755. The cubic root of 72179633 is about 416.3624510787.

The spelling of 72179633 in words is "seventy-two million, one hundred seventy-nine thousand, six hundred thirty-three".