149977 has 4 divisors (see below), whose sum is σ = 153216. Its totient is φ = 146740.

The previous prime is 149971. The next prime is 149993. The reversal of 149977 is 779941.

149977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 779941 = 137 ⋅5693.

It is a cyclic number.

It is not a de Polignac number, because 149977 - 2³ = 149969 is a prime.

It is a Duffinian number.

149977 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1549 + ... + 1642.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2¹⁴⁹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

149977 is a deficient number, since it is larger than the sum of its proper divisors (3239).

149977 is an equidigital number, since it uses as much as digits as its factorization.

149977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238.

The product of its digits is 15876, while the sum is 37.

The square root of 149977 is about 387.2686406101. The cubic root of 149977 is about 53.1302126373.

The spelling of 149977 in words is "one hundred forty-nine thousand, nine hundred seventy-seven".