425164391 has 2 divisors, whose sum is σ = 425164392. Its totient is φ = 425164390.

The previous prime is 425164307. The next prime is 425164409. The reversal of 425164391 is 193461524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425164391 - 2¹⁴ = 425148007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425164291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212582195 + 212582196.

It is an arithmetic number, because the mean of its divisors is an integer number (212582196).

Almost surely, 2^425164391 is an apocalyptic number.

425164391 is a deficient number, since it is larger than the sum of its proper divisors (1).

425164391 is an equidigital number, since it uses as much as digits as its factorization.

425164391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 425164391 is about 20619.5148100046. The cubic root of 425164391 is about 751.9442243744.

The spelling of 425164391 in words is "four hundred twenty-five million, one hundred sixty-four thousand, three hundred ninety-one".