31154026489 has 2 divisors, whose sum is σ = 31154026490. Its totient is φ = 31154026488.

The previous prime is 31154026441. The next prime is 31154026517. The reversal of 31154026489 is 98462045113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30654056889 + 499969600 = 175083^2 + 22360^2 .

It is a cyclic number.

It is not a de Polignac number, because 31154026489 - 2⁷ = 31154026361 is a prime.

It is not a weakly prime, because it can be changed into another prime (31454026489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15577013244 + 15577013245.

It is an arithmetic number, because the mean of its divisors is an integer number (15577013245).

Almost surely, 2^31154026489 is an apocalyptic number.

It is an amenable number.

31154026489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31154026489 is an equidigital number, since it uses as much as digits as its factorization.

31154026489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 31154026489 in words is "thirty-one billion, one hundred fifty-four million, twenty-six thousand, four hundred eighty-nine".