154080989 has 4 divisors (see below), whose sum is σ = 154863324. Its totient is φ = 153298656.

The previous prime is 154080977. The next prime is 154080991. The reversal of 154080989 is 989080451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122832889 + 31248100 = 11083^2 + 5590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154080989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154080389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390872 + ... + 391265.

It is an arithmetic number, because the mean of its divisors is an integer number (38715831).

Almost surely, 2^154080989 is an apocalyptic number.

It is an amenable number.

154080989 is a deficient number, since it is larger than the sum of its proper divisors (782335).

154080989 is an equidigital number, since it uses as much as digits as its factorization.

154080989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782334.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 154080989 is about 12412.9363568819. The cubic root of 154080989 is about 536.1047877940.

The spelling of 154080989 in words is "one hundred fifty-four million, eighty thousand, nine hundred eighty-nine".