825473981 has 8 divisors (see below), whose sum is σ = 920033280. Its totient is φ = 736026048.

The previous prime is 825473941. The next prime is 825474007. The reversal of 825473981 is 189374528.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 825473981 - 2¹⁰ = 825472957 is a prime.

It is a super-2 number, since 2×825473981² = 1362814586615976722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825473941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277501 + ... + 1278146.

It is an arithmetic number, because the mean of its divisors is an integer number (115004160).

Almost surely, 2^825473981 is an apocalyptic number.

It is an amenable number.

825473981 is a deficient number, since it is larger than the sum of its proper divisors (94559299).

825473981 is a wasteful number, since it uses less digits than its factorization.

825473981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555683.

The product of its digits is 483840, while the sum is 47.

The square root of 825473981 is about 28731.0629980862. The cubic root of 825473981 is about 938.0683059991.

The spelling of 825473981 in words is "eight hundred twenty-five million, four hundred seventy-three thousand, nine hundred eighty-one".