426664541 has 2 divisors, whose sum is σ = 426664542. Its totient is φ = 426664540.

The previous prime is 426664529. The next prime is 426664547. The reversal of 426664541 is 145466624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397005625 + 29658916 = 19925^2 + 5446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426664541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 426664495 and 426664504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426664547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213332270 + 213332271.

It is an arithmetic number, because the mean of its divisors is an integer number (213332271).

Almost surely, 2^426664541 is an apocalyptic number.

It is an amenable number.

426664541 is a deficient number, since it is larger than the sum of its proper divisors (1).

426664541 is an equidigital number, since it uses as much as digits as its factorization.

426664541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

The square root of 426664541 is about 20655.8597255113. The cubic root of 426664541 is about 752.8275728972.

The spelling of 426664541 in words is "four hundred twenty-six million, six hundred sixty-four thousand, five hundred forty-one".