231669429 has 12 divisors (see below), whose sum is σ = 319914816. Its totient is φ = 149118928.

The previous prime is 231669419. The next prime is 231669437. The reversal of 231669429 is 924966132.

It is not a de Polignac number, because 231669429 - 2⁵ = 231669397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231669419) 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, 43389 + ... + 48434.

It is an arithmetic number, because the mean of its divisors is an integer number (26659568).

Almost surely, 2^231669429 is an apocalyptic number.

231669429 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

231669429 is a deficient number, since it is larger than the sum of its proper divisors (88245387).

231669429 is an equidigital number, since it uses as much as digits as its factorization.

231669429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91884 (or 91855 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 231669429 is about 15220.6908187506. The cubic root of 231669429 is about 614.1713819176.

The spelling of 231669429 in words is "two hundred thirty-one million, six hundred sixty-nine thousand, four hundred twenty-nine".