231990149349 has 12 divisors (see below), whose sum is σ = 382967865696. Its totient is φ = 132565799592.

The previous prime is 231990149329. The next prime is 231990149441. The reversal of 231990149349 is 943941099132.

231990149349 is a `hidden beast` number, since 23 + 1 + 9 + 90 + 1 + 493 + 49 = 666.

It is not a de Polignac number, because 231990149349 - 2⁵ = 231990149317 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 231990149295 and 231990149304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231990149329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1841191599 + ... + 1841191724.

It is an arithmetic number, because the mean of its divisors is an integer number (31913988808).

Almost surely, 2^231990149349 is an apocalyptic number.

It is an amenable number.

231990149349 is a deficient number, since it is larger than the sum of its proper divisors (150977716347).

231990149349 is a wasteful number, since it uses less digits than its factorization.

231990149349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682383336 (or 3682383333 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 231990149349 in words is "two hundred thirty-one billion, nine hundred ninety million, one hundred forty-nine thousand, three hundred forty-nine".