426995687 has 2 divisors, whose sum is σ = 426995688. Its totient is φ = 426995686.

The previous prime is 426995641. The next prime is 426995743. The reversal of 426995687 is 786599624.

It is a happy number.

It is an a-pointer prime, because the next prime (426995743) can be obtained adding 426995687 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 426995687 - 2⁸ = 426995431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426995617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213497843 + 213497844.

It is an arithmetic number, because the mean of its divisors is an integer number (213497844).

Almost surely, 2^426995687 is an apocalyptic number.

426995687 is a deficient number, since it is larger than the sum of its proper divisors (1).

426995687 is an equidigital number, since it uses as much as digits as its factorization.

426995687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The square root of 426995687 is about 20663.8739591588. The cubic root of 426995687 is about 753.0222858767.

The spelling of 426995687 in words is "four hundred twenty-six million, nine hundred ninety-five thousand, six hundred eighty-seven".