149051977 has 2 divisors, whose sum is σ = 149051978. Its totient is φ = 149051976.

The previous prime is 149051939. The next prime is 149051989. The reversal of 149051977 is 779150941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134467216 + 14584761 = 11596^2 + 3819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149051977 is a prime.

It is not a weakly prime, because it can be changed into another prime (149001977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74525988 + 74525989.

It is an arithmetic number, because the mean of its divisors is an integer number (74525989).

Almost surely, 2^149051977 is an apocalyptic number.

It is an amenable number.

149051977 is a deficient number, since it is larger than the sum of its proper divisors (1).

149051977 is an equidigital number, since it uses as much as digits as its factorization.

149051977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 149051977 is about 12208.6844909679. The cubic root of 149051977 is about 530.2075572491.

The spelling of 149051977 in words is "one hundred forty-nine million, fifty-one thousand, nine hundred seventy-seven".