149453921 has 2 divisors, whose sum is σ = 149453922. Its totient is φ = 149453920.

The previous prime is 149453893. The next prime is 149453947. The reversal of 149453921 is 129354941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135466321 + 13987600 = 11639^2 + 3740^2 .

It is a cyclic number.

It is not a de Polignac number, because 149453921 - 2²⁶ = 82345057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149450921) 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, 74726960 + 74726961.

It is an arithmetic number, because the mean of its divisors is an integer number (74726961).

Almost surely, 2^149453921 is an apocalyptic number.

It is an amenable number.

149453921 is a deficient number, since it is larger than the sum of its proper divisors (1).

149453921 is an equidigital number, since it uses as much as digits as its factorization.

149453921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 149453921 is about 12225.1348049827. The cubic root of 149453921 is about 530.6837277576.

The spelling of 149453921 in words is "one hundred forty-nine million, four hundred fifty-three thousand, nine hundred twenty-one".