149957 has 4 divisors (see below), whose sum is σ = 158796. Its totient is φ = 141120.

The previous prime is 149953. The next prime is 149969. The reversal of 149957 is 759941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106276 + 43681 = 326^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 149957 - 2² = 149953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149953) 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, 4394 + ... + 4427.

It is an arithmetic number, because the mean of its divisors is an integer number (39699).

2¹⁴⁹⁹⁵⁷ is an apocalyptic number.

149957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

149957 is a deficient number, since it is larger than the sum of its proper divisors (8839).

149957 is an equidigital number, since it uses as much as digits as its factorization.

149957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8838.

The product of its digits is 11340, while the sum is 35.

The square root of 149957 is about 387.2428178805. The cubic root of 149957 is about 53.1278508274.

The spelling of 149957 in words is "one hundred forty-nine thousand, nine hundred fifty-seven".