425666369 has 2 divisors, whose sum is σ = 425666370. Its totient is φ = 425666368.

The previous prime is 425666323. The next prime is 425666393. The reversal of 425666369 is 963666524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383572225 + 42094144 = 19585^2 + 6488^2 .

It is a cyclic number.

It is not a de Polignac number, because 425666369 - 2¹² = 425662273 is a prime.

It is a super-2 number, since 2×425666369² = 362383715395288322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (425606369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212833184 + 212833185.

It is an arithmetic number, because the mean of its divisors is an integer number (212833185).

Almost surely, 2^425666369 is an apocalyptic number.

It is an amenable number.

425666369 is a deficient number, since it is larger than the sum of its proper divisors (1).

425666369 is an equidigital number, since it uses as much as digits as its factorization.

425666369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 47.

The square root of 425666369 is about 20631.6836201024. The cubic root of 425666369 is about 752.2400401513.

The spelling of 425666369 in words is "four hundred twenty-five million, six hundred sixty-six thousand, three hundred sixty-nine".