154958989 has 2 divisors, whose sum is σ = 154958990. Its totient is φ = 154958988.

The previous prime is 154958959. The next prime is 154959001. The reversal of 154958989 is 989859451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152102889 + 2856100 = 12333^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 154958989 - 2⁹ = 154958477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154958939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77479494 + 77479495.

It is an arithmetic number, because the mean of its divisors is an integer number (77479495).

Almost surely, 2^154958989 is an apocalyptic number.

It is an amenable number.

154958989 is a deficient number, since it is larger than the sum of its proper divisors (1).

154958989 is an equidigital number, since it uses as much as digits as its factorization.

154958989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 58.

The square root of 154958989 is about 12448.2524476330. The cubic root of 154958989 is about 537.1211553611.

The spelling of 154958989 in words is "one hundred fifty-four million, nine hundred fifty-eight thousand, nine hundred eighty-nine".