426291497 has 2 divisors, whose sum is σ = 426291498. Its totient is φ = 426291496.

The previous prime is 426291493. The next prime is 426291527. The reversal of 426291497 is 794192624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383728921 + 42562576 = 19589^2 + 6524^2 .

It is a cyclic number.

It is not a de Polignac number, because 426291497 - 2² = 426291493 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426291493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213145748 + 213145749.

It is an arithmetic number, because the mean of its divisors is an integer number (213145749).

Almost surely, 2^426291497 is an apocalyptic number.

It is an amenable number.

426291497 is a deficient number, since it is larger than the sum of its proper divisors (1).

426291497 is an equidigital number, since it uses as much as digits as its factorization.

426291497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 426291497 is about 20646.8277708708. The cubic root of 426291497 is about 752.6081032906.

It can be divided in two parts, 4262 and 91497, that added together give a palindrome (95759).

The spelling of 426291497 in words is "four hundred twenty-six million, two hundred ninety-one thousand, four hundred ninety-seven".