115948821 has 4 divisors (see below), whose sum is σ = 154598432. Its totient is φ = 77299212.

The previous prime is 115948817. The next prime is 115948837. The reversal of 115948821 is 128849511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 115948821 - 2² = 115948817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115948821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115948801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19324801 + ... + 19324806.

It is an arithmetic number, because the mean of its divisors is an integer number (38649608).

Almost surely, 2^115948821 is an apocalyptic number.

It is an amenable number.

115948821 is a deficient number, since it is larger than the sum of its proper divisors (38649611).

115948821 is an equidigital number, since it uses as much as digits as its factorization.

115948821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38649610.

The product of its digits is 23040, while the sum is 39.

The square root of 115948821 is about 10767.9534267195. The cubic root of 115948821 is about 487.6281614388.

The spelling of 115948821 in words is "one hundred fifteen million, nine hundred forty-eight thousand, eight hundred twenty-one".