234872639 has 2 divisors, whose sum is σ = 234872640. Its totient is φ = 234872638.

The previous prime is 234872611. The next prime is 234872717. The reversal of 234872639 is 936278432.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234872639 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 234872639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234872039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117436319 + 117436320.

It is an arithmetic number, because the mean of its divisors is an integer number (117436320).

Almost surely, 2^234872639 is an apocalyptic number.

234872639 is a deficient number, since it is larger than the sum of its proper divisors (1).

234872639 is an equidigital number, since it uses as much as digits as its factorization.

234872639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 44.

The square root of 234872639 is about 15325.5550959827. Note that the first 3 decimals coincide. The cubic root of 234872639 is about 616.9890775052.

The spelling of 234872639 in words is "two hundred thirty-four million, eight hundred seventy-two thousand, six hundred thirty-nine".