155360489 has 2 divisors, whose sum is σ = 155360490. Its totient is φ = 155360488.

The previous prime is 155360483. The next prime is 155360507. The reversal of 155360489 is 984063551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149035264 + 6325225 = 12208^2 + 2515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155360489 is a prime.

It is not a weakly prime, because it can be changed into another prime (155360483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77680244 + 77680245.

It is an arithmetic number, because the mean of its divisors is an integer number (77680245).

Almost surely, 2^155360489 is an apocalyptic number.

It is an amenable number.

155360489 is a deficient number, since it is larger than the sum of its proper divisors (1).

155360489 is an equidigital number, since it uses as much as digits as its factorization.

155360489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 155360489 is about 12464.3687766369. The cubic root of 155360489 is about 537.5846503779.

The spelling of 155360489 in words is "one hundred fifty-five million, three hundred sixty thousand, four hundred eighty-nine".