11309347897 has 2 divisors, whose sum is σ = 11309347898. Its totient is φ = 11309347896.

The previous prime is 11309347883. The next prime is 11309347921. The reversal of 11309347897 is 79874390311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11229852841 + 79495056 = 105971^2 + 8916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11309347897 is a prime.

It is not a weakly prime, because it can be changed into another prime (11309347807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5654673948 + 5654673949.

It is an arithmetic number, because the mean of its divisors is an integer number (5654673949).

Almost surely, 2^11309347897 is an apocalyptic number.

It is an amenable number.

11309347897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11309347897 is an equidigital number, since it uses as much as digits as its factorization.

11309347897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 11309347897 in words is "eleven billion, three hundred nine million, three hundred forty-seven thousand, eight hundred ninety-seven".