11897513447 has 2 divisors, whose sum is σ = 11897513448. Its totient is φ = 11897513446.

The previous prime is 11897513413. The next prime is 11897513471. The reversal of 11897513447 is 74431579811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11897513447 - 2⁸ = 11897513191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11897513395 and 11897513404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11890513447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5948756723 + 5948756724.

It is an arithmetic number, because the mean of its divisors is an integer number (5948756724).

Almost surely, 2^11897513447 is an apocalyptic number.

11897513447 is a deficient number, since it is larger than the sum of its proper divisors (1).

11897513447 is an equidigital number, since it uses as much as digits as its factorization.

11897513447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 50.

The spelling of 11897513447 in words is "eleven billion, eight hundred ninety-seven million, five hundred thirteen thousand, four hundred forty-seven".