83819725 has 30 divisors (see below), whose sum is σ = 114828650. Its totient is φ = 60693600.

The previous prime is 83819719. The next prime is 83819767. The reversal of 83819725 is 52791838.

It can be written as a sum of positive squares in 3 ways, for example, as 20043529 + 63776196 = 4477^2 + 7986^2 .

It is not a de Polignac number, because 83819725 - 2⁹ = 83819213 is a prime.

It is a super-4 number, since 4×83819725⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 365911 + ... + 366139.

Almost surely, 2^83819725 is an apocalyptic number.

It is an amenable number.

83819725 is a deficient number, since it is larger than the sum of its proper divisors (31008925).

83819725 is an equidigital number, since it uses as much as digits as its factorization.

83819725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 245 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 83819725 is about 9155.3113000050. The cubic root of 83819725 is about 437.6383888736.

The spelling of 83819725 in words is "eighty-three million, eight hundred nineteen thousand, seven hundred twenty-five".