83897847 has 12 divisors (see below), whose sum is σ = 132202824. Its totient is φ = 50847120.

The previous prime is 83897831. The next prime is 83897857. The reversal of 83897847 is 74879838.

It is not a de Polignac number, because 83897847 - 2⁴ = 83897831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83897793 and 83897802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83897857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423628 + ... + 423825.

It is an arithmetic number, because the mean of its divisors is an integer number (11016902).

Almost surely, 2^83897847 is an apocalyptic number.

83897847 is a deficient number, since it is larger than the sum of its proper divisors (48304977).

83897847 is a wasteful number, since it uses less digits than its factorization.

83897847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847470 (or 847467 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 83897847 is about 9159.5767915335. The cubic root of 83897847 is about 437.7743098238.

Subtracting from 83897847 its reverse (74879838), we obtain a square (9018009 = 3003²).

The spelling of 83897847 in words is "eighty-three million, eight hundred ninety-seven thousand, eight hundred forty-seven".