825611973 has 4 divisors (see below), whose sum is σ = 1100815968. Its totient is φ = 550407980.

The previous prime is 825611951. The next prime is 825611977. The reversal of 825611973 is 379116528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 825611973 - 2⁶ = 825611909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825611977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137601993 + ... + 137601998.

It is an arithmetic number, because the mean of its divisors is an integer number (275203992).

Almost surely, 2^825611973 is an apocalyptic number.

It is an amenable number.

825611973 is a deficient number, since it is larger than the sum of its proper divisors (275203995).

825611973 is a wasteful number, since it uses less digits than its factorization.

825611973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275203994.

The product of its digits is 90720, while the sum is 42.

The square root of 825611973 is about 28733.4643403819. The cubic root of 825611973 is about 938.1205744381.

The spelling of 825611973 in words is "eight hundred twenty-five million, six hundred eleven thousand, nine hundred seventy-three".