72073717 has 2 divisors, whose sum is σ = 72073718. Its totient is φ = 72073716.

The previous prime is 72073699. The next prime is 72073721. The reversal of 72073717 is 71737027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60824401 + 11249316 = 7799^2 + 3354^2 .

It is a cyclic number.

It is not a de Polignac number, because 72073717 - 2¹⁵ = 72040949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72070717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36036858 + 36036859.

It is an arithmetic number, because the mean of its divisors is an integer number (36036859).

Almost surely, 2^72073717 is an apocalyptic number.

It is an amenable number.

72073717 is a deficient number, since it is larger than the sum of its proper divisors (1).

72073717 is an equidigital number, since it uses as much as digits as its factorization.

72073717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14406, while the sum is 34.

The square root of 72073717 is about 8489.6240788388. The cubic root of 72073717 is about 416.1586953859.

The spelling of 72073717 in words is "seventy-two million, seventy-three thousand, seven hundred seventeen".