231409629 has 24 divisors (see below), whose sum is σ = 378155232. Its totient is φ = 140246640.

The previous prime is 231409613. The next prime is 231409643. The reversal of 231409629 is 926904132.

231409629 is a `hidden beast` number, since 23 + 1 + 4 + 0 + 9 + 629 = 666.

It is not a de Polignac number, because 231409629 - 2⁴ = 231409613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231409593 and 231409602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231409609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40614 + ... + 45959.

It is an arithmetic number, because the mean of its divisors is an integer number (15756468).

Almost surely, 2^231409629 is an apocalyptic number.

It is an amenable number.

231409629 is a deficient number, since it is larger than the sum of its proper divisors (146745603).

231409629 is an equidigital number, since it uses as much as digits as its factorization.

231409629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86599 (or 86587 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 231409629 is about 15212.1539894914. The cubic root of 231409629 is about 613.9417135658.

The spelling of 231409629 in words is "two hundred thirty-one million, four hundred nine thousand, six hundred twenty-nine".