154170889 has 2 divisors, whose sum is σ = 154170890. Its totient is φ = 154170888.

The previous prime is 154170881. The next prime is 154170899. The reversal of 154170889 is 988071451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132641289 + 21529600 = 11517^2 + 4640^2 .

It is an emirp because it is prime and its reverse (988071451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154170889 - 2³ = 154170881 is a prime.

It is not a weakly prime, because it can be changed into another prime (154170881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77085444 + 77085445.

It is an arithmetic number, because the mean of its divisors is an integer number (77085445).

Almost surely, 2^154170889 is an apocalyptic number.

It is an amenable number.

154170889 is a deficient number, since it is larger than the sum of its proper divisors (1).

154170889 is an equidigital number, since it uses as much as digits as its factorization.

154170889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 154170889 is about 12416.5570509703. The cubic root of 154170889 is about 536.2090326468.

The spelling of 154170889 in words is "one hundred fifty-four million, one hundred seventy thousand, eight hundred eighty-nine".