231949 has 4 divisors (see below), whose sum is σ = 233536. Its totient is φ = 230364.

The previous prime is 231947. The next prime is 231961. The reversal of 231949 is 949132.

It is a happy number.

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 231949 - 2¹ = 231947 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 (231943) 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, 549 + ... + 874.

It is an arithmetic number, because the mean of its divisors is an integer number (58384).

2²³¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

231949 is a deficient number, since it is larger than the sum of its proper divisors (1587).

231949 is a wasteful number, since it uses less digits than its factorization.

231949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586.

The product of its digits is 1944, while the sum is 28.

The square root of 231949 is about 481.6108387485. The cubic root of 231949 is about 61.4418336505.

The spelling of 231949 in words is "two hundred thirty-one thousand, nine hundred forty-nine".