230142989 has 2 divisors, whose sum is σ = 230142990. Its totient is φ = 230142988.

The previous prime is 230142961. The next prime is 230143019. The reversal of 230142989 is 989241032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224700100 + 5442889 = 14990^2 + 2333^2 .

It is a cyclic number.

It is not a de Polignac number, because 230142989 - 2²⁰ = 229094413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230142929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115071494 + 115071495.

It is an arithmetic number, because the mean of its divisors is an integer number (115071495).

Almost surely, 2^230142989 is an apocalyptic number.

It is an amenable number.

230142989 is a deficient number, since it is larger than the sum of its proper divisors (1).

230142989 is an equidigital number, since it uses as much as digits as its factorization.

230142989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 230142989 is about 15170.4643633608. The cubic root of 230142989 is about 612.8195097673.

The spelling of 230142989 in words is "two hundred thirty million, one hundred forty-two thousand, nine hundred eighty-nine".