426993481 has 2 divisors, whose sum is σ = 426993482. Its totient is φ = 426993480.

The previous prime is 426993433. The next prime is 426993509. The reversal of 426993481 is 184399624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425019456 + 1974025 = 20616^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 426993481 - 2¹⁷ = 426862409 is a prime.

It is a super-2 number, since 2×426993481² = 364646865632994722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (426994481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213496740 + 213496741.

It is an arithmetic number, because the mean of its divisors is an integer number (213496741).

Almost surely, 2^426993481 is an apocalyptic number.

It is an amenable number.

426993481 is a deficient number, since it is larger than the sum of its proper divisors (1).

426993481 is an equidigital number, since it uses as much as digits as its factorization.

426993481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 426993481 is about 20663.8205809090. The cubic root of 426993481 is about 753.0209890877.

The spelling of 426993481 in words is "four hundred twenty-six million, nine hundred ninety-three thousand, four hundred eighty-one".