149128877 has 2 divisors, whose sum is σ = 149128878. Its totient is φ = 149128876.

The previous prime is 149128843. The next prime is 149128901. The reversal of 149128877 is 778821941.

It is a happy number.

149128877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80802121 + 68326756 = 8989^2 + 8266^2 .

It is a cyclic number.

It is not a de Polignac number, because 149128877 - 2²⁰ = 148080301 is a prime.

It is a super-2 number, since 2×149128877² = 44478843910562258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149128807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74564438 + 74564439.

It is an arithmetic number, because the mean of its divisors is an integer number (74564439).

Almost surely, 2^149128877 is an apocalyptic number.

It is an amenable number.

149128877 is a deficient number, since it is larger than the sum of its proper divisors (1).

149128877 is an equidigital number, since it uses as much as digits as its factorization.

149128877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 47.

The square root of 149128877 is about 12211.8334823236. The cubic root of 149128877 is about 530.2987244424.

The spelling of 149128877 in words is "one hundred forty-nine million, one hundred twenty-eight thousand, eight hundred seventy-seven".