425909369 has 2 divisors, whose sum is σ = 425909370. Its totient is φ = 425909368.

The previous prime is 425909357. The next prime is 425909387. The reversal of 425909369 is 963909524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238548025 + 187361344 = 15445^2 + 13688^2 .

It is a cyclic number.

It is not a de Polignac number, because 425909369 - 2²⁸ = 157473913 is a prime.

It is a super-3 number, since 3×425909369³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (425909069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212954684 + 212954685.

It is an arithmetic number, because the mean of its divisors is an integer number (212954685).

Almost surely, 2^425909369 is an apocalyptic number.

It is an amenable number.

425909369 is a deficient number, since it is larger than the sum of its proper divisors (1).

425909369 is an equidigital number, since it uses as much as digits as its factorization.

425909369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 425909369 is about 20637.5717806141. The cubic root of 425909369 is about 752.3831565840.

The spelling of 425909369 in words is "four hundred twenty-five million, nine hundred nine thousand, three hundred sixty-nine".