234209831 has 2 divisors, whose sum is σ = 234209832. Its totient is φ = 234209830.

The previous prime is 234209821. The next prime is 234209849. The reversal of 234209831 is 138902432.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234209831 is a prime.

It is a super-2 number, since 2×234209831² = 109708489874097122, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_12860942 and since 234209831 and 12860942 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234209821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117104915 + 117104916.

It is an arithmetic number, because the mean of its divisors is an integer number (117104916).

Almost surely, 2^234209831 is an apocalyptic number.

234209831 is a deficient number, since it is larger than the sum of its proper divisors (1).

234209831 is an equidigital number, since it uses as much as digits as its factorization.

234209831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 234209831 is about 15303.9155447225. The cubic root of 234209831 is about 616.4081519135.

The spelling of 234209831 in words is "two hundred thirty-four million, two hundred nine thousand, eight hundred thirty-one".