11697521497 has 2 divisors, whose sum is σ = 11697521498. Its totient is φ = 11697521496.

The previous prime is 11697521477. The next prime is 11697521503. The reversal of 11697521497 is 79412579611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11542494096 + 155027401 = 107436^2 + 12451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11697521497 is a prime.

It is not a weakly prime, because it can be changed into another prime (11697521477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5848760748 + 5848760749.

It is an arithmetic number, because the mean of its divisors is an integer number (5848760749).

Almost surely, 2^11697521497 is an apocalyptic number.

It is an amenable number.

11697521497 is a deficient number, since it is larger than the sum of its proper divisors (1).

11697521497 is an equidigital number, since it uses as much as digits as its factorization.

11697521497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 52.

The spelling of 11697521497 in words is "eleven billion, six hundred ninety-seven million, five hundred twenty-one thousand, four hundred ninety-seven".