868238999 has 2 divisors, whose sum is σ = 868239000. Its totient is φ = 868238998.

The previous prime is 868238971. The next prime is 868239017. The reversal of 868238999 is 999832868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868238999 - 2¹² = 868234903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868238299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434119499 + 434119500.

It is an arithmetic number, because the mean of its divisors is an integer number (434119500).

Almost surely, 2^868238999 is an apocalyptic number.

868238999 is a deficient number, since it is larger than the sum of its proper divisors (1).

868238999 is an equidigital number, since it uses as much as digits as its factorization.

868238999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 62.

The square root of 868238999 is about 29465.8955234692. The cubic root of 868238999 is about 953.9957276317.

The spelling of 868238999 in words is "eight hundred sixty-eight million, two hundred thirty-eight thousand, nine hundred ninety-nine".