149625989 has 2 divisors, whose sum is σ = 149625990. Its totient is φ = 149625988.

The previous prime is 149625979. The next prime is 149625991. The reversal of 149625989 is 989526941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147816964 + 1809025 = 12158^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 149625989 - 2⁸ = 149625733 is a prime.

Together with 149625991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149625989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149625919) 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, 74812994 + 74812995.

It is an arithmetic number, because the mean of its divisors is an integer number (74812995).

Almost surely, 2^149625989 is an apocalyptic number.

It is an amenable number.

149625989 is a deficient number, since it is larger than the sum of its proper divisors (1).

149625989 is an equidigital number, since it uses as much as digits as its factorization.

149625989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 53.

The square root of 149625989 is about 12232.1702489787. The cubic root of 149625989 is about 530.8873103869.

The spelling of 149625989 in words is "one hundred forty-nine million, six hundred twenty-five thousand, nine hundred eighty-nine".