426166991 has 2 divisors, whose sum is σ = 426166992. Its totient is φ = 426166990.

The previous prime is 426166987. The next prime is 426167029. The reversal of 426166991 is 199661624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 426166991 - 2² = 426166987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426166901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213083495 + 213083496.

It is an arithmetic number, because the mean of its divisors is an integer number (213083496).

Almost surely, 2^426166991 is an apocalyptic number.

426166991 is a deficient number, since it is larger than the sum of its proper divisors (1).

426166991 is an equidigital number, since it uses as much as digits as its factorization.

426166991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 426166991 is about 20643.8124143773. The cubic root of 426166991 is about 752.5348253034.

The spelling of 426166991 in words is "four hundred twenty-six million, one hundred sixty-six thousand, nine hundred ninety-one".