149151889 has 2 divisors, whose sum is σ = 149151890. Its totient is φ = 149151888.

The previous prime is 149151887. The next prime is 149151917. The reversal of 149151889 is 988151941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146289025 + 2862864 = 12095^2 + 1692^2 .

It is a cyclic number.

It is not a de Polignac number, because 149151889 - 2¹ = 149151887 is a prime.

Together with 149151887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (149151887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74575944 + 74575945.

It is an arithmetic number, because the mean of its divisors is an integer number (74575945).

Almost surely, 2^149151889 is an apocalyptic number.

It is an amenable number.

149151889 is a deficient number, since it is larger than the sum of its proper divisors (1).

149151889 is an equidigital number, since it uses as much as digits as its factorization.

149151889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 46.

The square root of 149151889 is about 12212.7756468380. The cubic root of 149151889 is about 530.3259997470.

The spelling of 149151889 in words is "one hundred forty-nine million, one hundred fifty-one thousand, eight hundred eighty-nine".