83947285 has 16 divisors (see below), whose sum is σ = 102783600. Its totient is φ = 65802240.

The previous prime is 83947277. The next prime is 83947291. The reversal of 83947285 is 58274938.

It can be written as a sum of positive squares in 8 ways, for example, as 33281361 + 50665924 = 5769^2 + 7118^2 .

It is not a de Polignac number, because 83947285 - 2³ = 83947277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136639 + ... + 137251.

It is an arithmetic number, because the mean of its divisors is an integer number (6423975).

Almost surely, 2^83947285 is an apocalyptic number.

It is an amenable number.

83947285 is a deficient number, since it is larger than the sum of its proper divisors (18836315).

83947285 is a wasteful number, since it uses less digits than its factorization.

83947285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its digits is 483840, while the sum is 46.

The square root of 83947285 is about 9162.2750995591. The cubic root of 83947285 is about 437.8602811862.

The spelling of 83947285 in words is "eighty-three million, nine hundred forty-seven thousand, two hundred eighty-five".