83407857 has 24 divisors (see below), whose sum is σ = 124086144. Its totient is φ = 49538496.

The previous prime is 83407813. The next prime is 83407861. The reversal of 83407857 is 75870438.

It is not a de Polignac number, because 83407857 - 2¹⁶ = 83342321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83407897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31528 + ... + 34070.

It is an arithmetic number, because the mean of its divisors is an integer number (5170256).

Almost surely, 2^83407857 is an apocalyptic number.

83407857 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

83407857 is a deficient number, since it is larger than the sum of its proper divisors (40678287).

83407857 is a wasteful number, since it uses less digits than its factorization.

83407857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617 (or 2588 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 83407857 is about 9132.7902089121. The cubic root of 83407857 is about 436.9203984128.

The spelling of 83407857 in words is "eighty-three million, four hundred seven thousand, eight hundred fifty-seven".