149128901 has 2 divisors, whose sum is σ = 149128902. Its totient is φ = 149128900.

The previous prime is 149128877. The next prime is 149128919. The reversal of 149128901 is 109821941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143976001 + 5152900 = 11999^2 + 2270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149128901 is a prime.

It is a super-2 number, since 2×149128901² = 44478858226935602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149128961) 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, 74564450 + 74564451.

It is an arithmetic number, because the mean of its divisors is an integer number (74564451).

Almost surely, 2^149128901 is an apocalyptic number.

It is an amenable number.

149128901 is a deficient number, since it is larger than the sum of its proper divisors (1).

149128901 is an equidigital number, since it uses as much as digits as its factorization.

149128901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 149128901 is about 12211.8344649770. The cubic root of 149128901 is about 530.2987528902.

The spelling of 149128901 in words is "one hundred forty-nine million, one hundred twenty-eight thousand, nine hundred one".