115648921 has 2 divisors, whose sum is σ = 115648922. Its totient is φ = 115648920.

The previous prime is 115648919. The next prime is 115648927. The reversal of 115648921 is 129846511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67831696 + 47817225 = 8236^2 + 6915^2 .

It is an emirp because it is prime and its reverse (129846511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115648921 - 2¹ = 115648919 is a prime.

Together with 115648919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115648927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57824460 + 57824461.

It is an arithmetic number, because the mean of its divisors is an integer number (57824461).

Almost surely, 2^115648921 is an apocalyptic number.

It is an amenable number.

115648921 is a deficient number, since it is larger than the sum of its proper divisors (1).

115648921 is an equidigital number, since it uses as much as digits as its factorization.

115648921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 115648921 is about 10754.0188301862. The cubic root of 115648921 is about 487.2073839839.

The spelling of 115648921 in words is "one hundred fifteen million, six hundred forty-eight thousand, nine hundred twenty-one".