425771813 has 2 divisors, whose sum is σ = 425771814. Its totient is φ = 425771812.

The previous prime is 425771809. The next prime is 425771833. The reversal of 425771813 is 318177524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424442404 + 1329409 = 20602^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 425771813 - 2² = 425771809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425771833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212885906 + 212885907.

It is an arithmetic number, because the mean of its divisors is an integer number (212885907).

Almost surely, 2^425771813 is an apocalyptic number.

It is an amenable number.

425771813 is a deficient number, since it is larger than the sum of its proper divisors (1).

425771813 is an equidigital number, since it uses as much as digits as its factorization.

425771813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 425771813 is about 20634.2388519664. The cubic root of 425771813 is about 752.3021487696.

The spelling of 425771813 in words is "four hundred twenty-five million, seven hundred seventy-one thousand, eight hundred thirteen".