149831 has 8 divisors (see below), whose sum is σ = 167184. Its totient is φ = 133120.

The previous prime is 149827. The next prime is 149837. The reversal of 149831 is 138941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149831 - 2² = 149827 is a prime.

It is a super-2 number, since 2×149831² = 44898657122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 711.

It is an arithmetic number, because the mean of its divisors is an integer number (20898).

2¹⁴⁹⁸³¹ is an apocalyptic number.

149831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

149831 is a deficient number, since it is larger than the sum of its proper divisors (17353).

149831 is a wasteful number, since it uses less digits than its factorization.

149831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its digits is 864, while the sum is 26.

The square root of 149831 is about 387.0800950708. The cubic root of 149831 is about 53.1129665940.

The spelling of 149831 in words is "one hundred forty-nine thousand, eight hundred thirty-one".