425566837 has 2 divisors, whose sum is σ = 425566838. Its totient is φ = 425566836.

The previous prime is 425566819. The next prime is 425566849. The reversal of 425566837 is 738665524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319908996 + 105657841 = 17886^2 + 10279^2 .

It is a cyclic number.

It is not a de Polignac number, because 425566837 - 2¹⁵ = 425534069 is a prime.

It is a super-2 number, since 2×425566837² = 362214265508369138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425566937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212783418 + 212783419.

It is an arithmetic number, because the mean of its divisors is an integer number (212783419).

Almost surely, 2^425566837 is an apocalyptic number.

It is an amenable number.

425566837 is a deficient number, since it is larger than the sum of its proper divisors (1).

425566837 is an equidigital number, since it uses as much as digits as its factorization.

425566837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 46.

The square root of 425566837 is about 20629.2713637685. The cubic root of 425566837 is about 752.1814044077.

The spelling of 425566837 in words is "four hundred twenty-five million, five hundred sixty-six thousand, eight hundred thirty-seven".