72146497 has 2 divisors, whose sum is σ = 72146498. Its totient is φ = 72146496.

The previous prime is 72146491. The next prime is 72146507. The reversal of 72146497 is 79464127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47554816 + 24591681 = 6896^2 + 4959^2 .

It is a cyclic number.

It is not a de Polignac number, because 72146497 - 2³ = 72146489 is a prime.

It is not a weakly prime, because it can be changed into another prime (72146491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36073248 + 36073249.

It is an arithmetic number, because the mean of its divisors is an integer number (36073249).

Almost surely, 2^72146497 is an apocalyptic number.

It is an amenable number.

72146497 is a deficient number, since it is larger than the sum of its proper divisors (1).

72146497 is an equidigital number, since it uses as much as digits as its factorization.

72146497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 72146497 is about 8493.9094061569. The cubic root of 72146497 is about 416.2987272027.

The spelling of 72146497 in words is "seventy-two million, one hundred forty-six thousand, four hundred ninety-seven".