231580889 has 2 divisors, whose sum is σ = 231580890. Its totient is φ = 231580888.

The previous prime is 231580861. The next prime is 231580897. The reversal of 231580889 is 988085132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151782400 + 79798489 = 12320^2 + 8933^2 .

It is a cyclic number.

It is not a de Polignac number, because 231580889 - 2¹⁶ = 231515353 is a prime.

It is not a weakly prime, because it can be changed into another prime (231580829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115790444 + 115790445.

It is an arithmetic number, because the mean of its divisors is an integer number (115790445).

Almost surely, 2^231580889 is an apocalyptic number.

It is an amenable number.

231580889 is a deficient number, since it is larger than the sum of its proper divisors (1).

231580889 is an equidigital number, since it uses as much as digits as its factorization.

231580889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 231580889 is about 15217.7820000156. The cubic root of 231580889 is about 614.0931300979.

The spelling of 231580889 in words is "two hundred thirty-one million, five hundred eighty thousand, eight hundred eighty-nine".