425779187 has 2 divisors, whose sum is σ = 425779188. Its totient is φ = 425779186.

The previous prime is 425779181. The next prime is 425779199. The reversal of 425779187 is 781977524.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425779187 - 2²⁰ = 424730611 is a prime.

It is not a weakly prime, because it can be changed into another prime (425779181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212889593 + 212889594.

It is an arithmetic number, because the mean of its divisors is an integer number (212889594).

Almost surely, 2^425779187 is an apocalyptic number.

425779187 is a deficient number, since it is larger than the sum of its proper divisors (1).

425779187 is an equidigital number, since it uses as much as digits as its factorization.

425779187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 50.

The square root of 425779187 is about 20634.4175347888. The cubic root of 425779187 is about 752.3064918190.

The spelling of 425779187 in words is "four hundred twenty-five million, seven hundred seventy-nine thousand, one hundred eighty-seven".