230451989 has 4 divisors (see below), whose sum is σ = 231467424. Its totient is φ = 229436556.

The previous prime is 230451971. The next prime is 230451997. The reversal of 230451989 is 989154032.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230451989 is a prime.

It is a super-2 number, since 2×230451989² = 106216238468112242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230451919) 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, 507377 + ... + 507830.

It is an arithmetic number, because the mean of its divisors is an integer number (57866856).

Almost surely, 2^230451989 is an apocalyptic number.

It is an amenable number.

230451989 is a deficient number, since it is larger than the sum of its proper divisors (1015435).

230451989 is a wasteful number, since it uses less digits than its factorization.

230451989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015434.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 230451989 is about 15180.6452102669. The cubic root of 230451989 is about 613.0936531659.

The spelling of 230451989 in words is "two hundred thirty million, four hundred fifty-one thousand, nine hundred eighty-nine".