825955439 has 2 divisors, whose sum is σ = 825955440. Its totient is φ = 825955438.

The previous prime is 825955411. The next prime is 825955469. The reversal of 825955439 is 934559528.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825955439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825955469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412977719 + 412977720.

It is an arithmetic number, because the mean of its divisors is an integer number (412977720).

Almost surely, 2^825955439 is an apocalyptic number.

825955439 is a deficient number, since it is larger than the sum of its proper divisors (1).

825955439 is an equidigital number, since it uses as much as digits as its factorization.

825955439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 50.

The square root of 825955439 is about 28739.4404782000. The cubic root of 825955439 is about 938.2506467806.

The spelling of 825955439 in words is "eight hundred twenty-five million, nine hundred fifty-five thousand, four hundred thirty-nine".