234187393 has 36 divisors (see below), whose sum is σ = 282387196. Its totient is φ = 193881600.

The previous prime is 234187381. The next prime is 234187433. The reversal of 234187393 is 393781432.

It can be written as a sum of positive squares in 6 ways, for example, as 7745089 + 226442304 = 2783^2 + 15048^2 .

It is a de Polignac number, because none of the positive numbers 2^k-234187393 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (234187333) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1293763 + ... + 1293943.

Almost surely, 2^234187393 is an apocalyptic number.

It is an amenable number.

234187393 is a deficient number, since it is larger than the sum of its proper divisors (48199803).

234187393 is a wasteful number, since it uses less digits than its factorization.

234187393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 246 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 234187393 is about 15303.1824467984. The cubic root of 234187393 is about 616.3884667053.

The spelling of 234187393 in words is "two hundred thirty-four million, one hundred eighty-seven thousand, three hundred ninety-three".