149677977 has 4 divisors (see below), whose sum is σ = 199570640. Its totient is φ = 99785316.

The previous prime is 149677973. The next prime is 149677981. The reversal of 149677977 is 779776941.

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 an interprime number because it is at equal distance from previous prime (149677973) and next prime (149677981).

It is not a de Polignac number, because 149677977 - 2² = 149677973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149677973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24946327 + ... + 24946332.

It is an arithmetic number, because the mean of its divisors is an integer number (49892660).

Almost surely, 2^149677977 is an apocalyptic number.

It is an amenable number.

149677977 is a deficient number, since it is larger than the sum of its proper divisors (49892663).

149677977 is an equidigital number, since it uses as much as digits as its factorization.

149677977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49892662.

The product of its digits is 4667544, while the sum is 57.

The square root of 149677977 is about 12234.2951165974. The cubic root of 149677977 is about 530.9487893981.

The spelling of 149677977 in words is "one hundred forty-nine million, six hundred seventy-seven thousand, nine hundred seventy-seven".