72797317 has 2 divisors, whose sum is σ = 72797318. Its totient is φ = 72797316.

The previous prime is 72797293. The next prime is 72797353. The reversal of 72797317 is 71379727.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42393121 + 30404196 = 6511^2 + 5514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72797317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72797117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36398658 + 36398659.

It is an arithmetic number, because the mean of its divisors is an integer number (36398659).

Almost surely, 2^72797317 is an apocalyptic number.

It is an amenable number.

72797317 is a deficient number, since it is larger than the sum of its proper divisors (1).

72797317 is an equidigital number, since it uses as much as digits as its factorization.

72797317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129654, while the sum is 43.

The square root of 72797317 is about 8532.1343754069. The cubic root of 72797317 is about 417.5467661288.

The spelling of 72797317 in words is "seventy-two million, seven hundred ninety-seven thousand, three hundred seventeen".