422661287 has 2 divisors, whose sum is σ = 422661288. Its totient is φ = 422661286.

The previous prime is 422661263. The next prime is 422661299. The reversal of 422661287 is 782166224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 422661287 - 2²⁴ = 405884071 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 422661287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422661257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211330643 + 211330644.

It is an arithmetic number, because the mean of its divisors is an integer number (211330644).

Almost surely, 2^422661287 is an apocalyptic number.

422661287 is a deficient number, since it is larger than the sum of its proper divisors (1).

422661287 is an equidigital number, since it uses as much as digits as its factorization.

422661287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 38.

The square root of 422661287 is about 20558.7277573297. The cubic root of 422661287 is about 750.4656586747.

The spelling of 422661287 in words is "four hundred twenty-two million, six hundred sixty-one thousand, two hundred eighty-seven".