230699991 has 4 divisors (see below), whose sum is σ = 307599992. Its totient is φ = 153799992.

The previous prime is 230699983. The next prime is 230699993. The reversal of 230699991 is 199996032.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 230699991 - 2³ = 230699983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 230699991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230699993) 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, 38449996 + ... + 38450001.

It is an arithmetic number, because the mean of its divisors is an integer number (76899998).

Almost surely, 2^230699991 is an apocalyptic number.

230699991 is a deficient number, since it is larger than the sum of its proper divisors (76900001).

230699991 is an equidigital number, since it uses as much as digits as its factorization.

230699991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76900000.

The product of its (nonzero) digits is 236196, while the sum is 48.

The square root of 230699991 is about 15188.8113754829. The cubic root of 230699991 is about 613.3135022009.

The spelling of 230699991 in words is "two hundred thirty million, six hundred ninety-nine thousand, nine hundred ninety-one".