812425399 has 2 divisors, whose sum is σ = 812425400. Its totient is φ = 812425398.

The previous prime is 812425387. The next prime is 812425403. The reversal of 812425399 is 993524218.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812425399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812425799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406212699 + 406212700.

It is an arithmetic number, because the mean of its divisors is an integer number (406212700).

Almost surely, 2^812425399 is an apocalyptic number.

812425399 is a deficient number, since it is larger than the sum of its proper divisors (1).

812425399 is an equidigital number, since it uses as much as digits as its factorization.

812425399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 812425399 is about 28503.0770093336. The cubic root of 812425399 is about 933.0992294518.

The spelling of 812425399 in words is "eight hundred twelve million, four hundred twenty-five thousand, three hundred ninety-nine".