72329717 has 2 divisors, whose sum is σ = 72329718. Its totient is φ = 72329716.

The previous prime is 72329711. The next prime is 72329731. The reversal of 72329717 is 71792327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39450961 + 32878756 = 6281^2 + 5734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72329717 is a prime.

It is a super-2 number, since 2×72329717² = 10463175922600178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72329711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36164858 + 36164859.

It is an arithmetic number, because the mean of its divisors is an integer number (36164859).

Almost surely, 2^72329717 is an apocalyptic number.

It is an amenable number.

72329717 is a deficient number, since it is larger than the sum of its proper divisors (1).

72329717 is an equidigital number, since it uses as much as digits as its factorization.

72329717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 38.

The square root of 72329717 is about 8504.6879425409. The cubic root of 72329717 is about 416.6508338162.

The spelling of 72329717 in words is "seventy-two million, three hundred twenty-nine thousand, seven hundred seventeen".