230500991 has 4 divisors (see below), whose sum is σ = 263429712. Its totient is φ = 197572272.

The previous prime is 230500981. The next prime is 230501039. The reversal of 230500991 is 199005032.

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

It is a cyclic number.

It is not a de Polignac number, because 230500991 - 2¹⁰ = 230499967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230500981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16464350 + ... + 16464363.

It is an arithmetic number, because the mean of its divisors is an integer number (65857428).

Almost surely, 2^230500991 is an apocalyptic number.

230500991 is a deficient number, since it is larger than the sum of its proper divisors (32928721).

230500991 is an equidigital number, since it uses as much as digits as its factorization.

230500991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32928720.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 230500991 is about 15182.2590875008. The cubic root of 230500991 is about 613.1371050018.

The spelling of 230500991 in words is "two hundred thirty million, five hundred thousand, nine hundred ninety-one".