115864643 has 2 divisors, whose sum is σ = 115864644. Its totient is φ = 115864642.

The previous prime is 115864633. The next prime is 115864667. The reversal of 115864643 is 346468511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115864643 - 2⁴ = 115864627 is a prime.

It is equal to p_6619178 and since 115864643 and 6619178 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 115864597 and 115864606.

It is not a weakly prime, because it can be changed into another prime (115864633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57932321 + 57932322.

It is an arithmetic number, because the mean of its divisors is an integer number (57932322).

Almost surely, 2^115864643 is an apocalyptic number.

115864643 is a deficient number, since it is larger than the sum of its proper divisors (1).

115864643 is an equidigital number, since it uses as much as digits as its factorization.

115864643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 115864643 is about 10764.0439891335. The cubic root of 115864643 is about 487.5101280385.

The spelling of 115864643 in words is "one hundred fifteen million, eight hundred sixty-four thousand, six hundred forty-three".