425685499 has 2 divisors, whose sum is σ = 425685500. Its totient is φ = 425685498.

The previous prime is 425685437. The next prime is 425685517. The reversal of 425685499 is 994586524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425685499 is a prime.

It is not a weakly prime, because it can be changed into another prime (425685419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212842749 + 212842750.

It is an arithmetic number, because the mean of its divisors is an integer number (212842750).

Almost surely, 2^425685499 is an apocalyptic number.

425685499 is a deficient number, since it is larger than the sum of its proper divisors (1).

425685499 is an equidigital number, since it uses as much as digits as its factorization.

425685499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 52.

The square root of 425685499 is about 20632.1472222355. The cubic root of 425685499 is about 752.2513088642.

The spelling of 425685499 in words is "four hundred twenty-five million, six hundred eighty-five thousand, four hundred ninety-nine".