83857557 has 8 divisors (see below), whose sum is σ = 127782976. Its totient is φ = 47918592.

The previous prime is 83857523. The next prime is 83857559. The reversal of 83857557 is 75575838.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83857557 - 2¹² = 83853461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83857559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1996588 + ... + 1996629.

It is an arithmetic number, because the mean of its divisors is an integer number (15972872).

Almost surely, 2^83857557 is an apocalyptic number.

It is an amenable number.

83857557 is a deficient number, since it is larger than the sum of its proper divisors (43925419).

83857557 is a wasteful number, since it uses less digits than its factorization.

83857557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993227.

The product of its digits is 1176000, while the sum is 48.

The square root of 83857557 is about 9157.3771900037. The cubic root of 83857557 is about 437.7042216085.

The spelling of 83857557 in words is "eighty-three million, eight hundred fifty-seven thousand, five hundred fifty-seven".