868405423 has 2 divisors, whose sum is σ = 868405424. Its totient is φ = 868405422.

The previous prime is 868405337. The next prime is 868405427. The reversal of 868405423 is 324504868.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868405423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868405427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434202711 + 434202712.

It is an arithmetic number, because the mean of its divisors is an integer number (434202712).

Almost surely, 2^868405423 is an apocalyptic number.

868405423 is a deficient number, since it is larger than the sum of its proper divisors (1).

868405423 is an equidigital number, since it uses as much as digits as its factorization.

868405423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 868405423 is about 29468.7193987116. The cubic root of 868405423 is about 954.0566776858.

The spelling of 868405423 in words is "eight hundred sixty-eight million, four hundred five thousand, four hundred twenty-three".