235688389 has 2 divisors, whose sum is σ = 235688390. Its totient is φ = 235688388.

The previous prime is 235688371. The next prime is 235688419. The reversal of 235688389 is 983886532.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210105025 + 25583364 = 14495^2 + 5058^2 .

It is a cyclic number.

It is not a de Polignac number, because 235688389 - 2¹⁷ = 235557317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235688309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117844194 + 117844195.

It is an arithmetic number, because the mean of its divisors is an integer number (117844195).

Almost surely, 2^235688389 is an apocalyptic number.

It is an amenable number.

235688389 is a deficient number, since it is larger than the sum of its proper divisors (1).

235688389 is an equidigital number, since it uses as much as digits as its factorization.

235688389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 52.

The square root of 235688389 is about 15352.1460714781. The cubic root of 235688389 is about 617.7025525093.

The spelling of 235688389 in words is "two hundred thirty-five million, six hundred eighty-eight thousand, three hundred eighty-nine".