426005491 has 2 divisors, whose sum is σ = 426005492. Its totient is φ = 426005490.

The previous prime is 426005449. The next prime is 426005507. The reversal of 426005491 is 194500624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 426005491 - 2²¹ = 423908339 is a prime.

It is a Chen prime.

It is equal to p_22647217 and since 426005491 and 22647217 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (426005291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213002745 + 213002746.

It is an arithmetic number, because the mean of its divisors is an integer number (213002746).

Almost surely, 2^426005491 is an apocalyptic number.

426005491 is a deficient number, since it is larger than the sum of its proper divisors (1).

426005491 is an equidigital number, since it uses as much as digits as its factorization.

426005491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 426005491 is about 20639.9004600313. The cubic root of 426005491 is about 752.4397532367.

The spelling of 426005491 in words is "four hundred twenty-six million, five thousand, four hundred ninety-one".