83997851 has 8 divisors (see below), whose sum is σ = 96699360. Its totient is φ = 71471808.

The previous prime is 83997847. The next prime is 83997869. The reversal of 83997851 is 15879938.

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

It is a cyclic number.

It is not a de Polignac number, because 83997851 - 2² = 83997847 is a prime.

It is a super-3 number, since 3×83997851³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83997851.

It is not an unprimeable number, because it can be changed into a prime (83997811) 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, 42836 + ... + 44753.

It is an arithmetic number, because the mean of its divisors is an integer number (12087420).

Almost surely, 2^83997851 is an apocalyptic number.

83997851 is a deficient number, since it is larger than the sum of its proper divisors (12701509).

83997851 is a wasteful number, since it uses less digits than its factorization.

83997851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87733.

The product of its digits is 544320, while the sum is 50.

The square root of 83997851 is about 9165.0341516003. The cubic root of 83997851 is about 437.9481792003.

It can be divided in two parts, 83997 and 851, that added together give a palindrome (84848).

The spelling of 83997851 in words is "eighty-three million, nine hundred ninety-seven thousand, eight hundred fifty-one".