825919 has 2 divisors, whose sum is σ = 825920. Its totient is φ = 825918.

The previous prime is 825889. The next prime is 825947. The reversal of 825919 is 919528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 825919 - 2⁷ = 825791 is a prime.

It is a super-2 number, since 2×825919² = 1364284389122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412959 + 412960.

It is an arithmetic number, because the mean of its divisors is an integer number (412960).

2⁸²⁵⁹¹⁹ is an apocalyptic number.

825919 is a deficient number, since it is larger than the sum of its proper divisors (1).

825919 is an equidigital number, since it uses as much as digits as its factorization.

825919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 825919 is about 908.8008582742. The cubic root of 825919 is about 93.8236848854.

The spelling of 825919 in words is "eight hundred twenty-five thousand, nine hundred nineteen".