83847889225 has 27 divisors (see below), whose sum is σ = 107734179007. Its totient is φ = 64732834880.

The previous prime is 83847889217. The next prime is 83847889249. The reversal of 83847889225 is 52298874838.

The square root of 83847889225 is 289565.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 83707798329 + 140090896 = 289323^2 + 11836^2 .

It is not a de Polignac number, because 83847889225 - 2³ = 83847889217 is a prime.

It is a super-2 number, since 2×83847889225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 41985927 + ... + 41987923.

Almost surely, 2^83847889225 is an apocalyptic number.

83847889225 is the 289565-th square number.

83847889225 is the 144783-rd centered octagonal number.

It is an amenable number.

83847889225 is a deficient number, since it is larger than the sum of its proper divisors (23886289782).

83847889225 is an frugal number, since it uses more digits than its factorization.

83847889225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062 (or 2031 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 64.

Multiplying 83847889225 by its sum of digits (64), we get a square (5366264910400 = 2316520²).

The spelling of 83847889225 in words is "eighty-three billion, eight hundred forty-seven million, eight hundred eighty-nine thousand, two hundred twenty-five".