83557863 has 6 divisors (see below), whose sum is σ = 120694704. Its totient is φ = 55705236.

The previous prime is 83557853. The next prime is 83557867. The reversal of 83557863 is 36875538.

It is not a de Polignac number, because 83557863 - 2⁴ = 83557847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83557867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4642095 + ... + 4642112.

It is an arithmetic number, because the mean of its divisors is an integer number (20115784).

Almost surely, 2^83557863 is an apocalyptic number.

83557863 is a deficient number, since it is larger than the sum of its proper divisors (37136841).

83557863 is a wasteful number, since it uses less digits than its factorization.

83557863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9284213 (or 9284210 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 83557863 is about 9140.9990154250. Note that the first 3 decimals coincide. The cubic root of 83557863 is about 437.1821700332.

The spelling of 83557863 in words is "eighty-three million, five hundred fifty-seven thousand, eight hundred sixty-three".