149715977 has 4 divisors (see below), whose sum is σ = 149746896. Its totient is φ = 149685060.

The previous prime is 149715971. The next prime is 149716013. The reversal of 149715977 is 779517941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149715977 - 2⁶ = 149715913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149715971) 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 in 3 ways as a sum of consecutive naturals, for example, 6443 + ... + 18464.

It is an arithmetic number, because the mean of its divisors is an integer number (37436724).

Almost surely, 2^149715977 is an apocalyptic number.

It is an amenable number.

149715977 is a deficient number, since it is larger than the sum of its proper divisors (30919).

149715977 is an equidigital number, since it uses as much as digits as its factorization.

149715977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30918.

The product of its digits is 555660, while the sum is 50.

The square root of 149715977 is about 12235.8480294584. The cubic root of 149715977 is about 530.9937177330.

The spelling of 149715977 in words is "one hundred forty-nine million, seven hundred fifteen thousand, nine hundred seventy-seven".