149777 has 4 divisors (see below), whose sum is σ = 157680. Its totient is φ = 141876.

The previous prime is 149771. The next prime is 149791. The reversal of 149777 is 777941.

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: 777941 = 499 ⋅1559.

It is a cyclic number.

It is not a de Polignac number, because 149777 - 2⁶ = 149713 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (149771) 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, 3923 + ... + 3960.

It is an arithmetic number, because the mean of its divisors is an integer number (39420).

2¹⁴⁹⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

149777 is a deficient number, since it is larger than the sum of its proper divisors (7903).

149777 is an equidigital number, since it uses as much as digits as its factorization.

149777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902.

The product of its digits is 12348, while the sum is 35.

The square root of 149777 is about 387.0103357793. The cubic root of 149777 is about 53.1065850823.

The spelling of 149777 in words is "one hundred forty-nine thousand, seven hundred seventy-seven".