83421537 has 8 divisors (see below), whose sum is σ = 111449280. Its totient is φ = 55504080.

The previous prime is 83421517. The next prime is 83421539. The reversal of 83421537 is 73512438.

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

It is not a de Polignac number, because 83421537 - 2¹² = 83417441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83421498 and 83421507.

It is not an unprimeable number, because it can be changed into a prime (83421539) 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, 25789 + ... + 28842.

It is an arithmetic number, because the mean of its divisors is an integer number (13931160).

Almost surely, 2^83421537 is an apocalyptic number.

It is an amenable number.

83421537 is a deficient number, since it is larger than the sum of its proper divisors (28027743).

83421537 is a wasteful number, since it uses less digits than its factorization.

83421537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55143.

The product of its digits is 20160, while the sum is 33.

The square root of 83421537 is about 9133.5391278518. The cubic root of 83421537 is about 436.9442840295.

Subtracting from 83421537 its reverse (73512438), we obtain a palindrome (9909099).

The spelling of 83421537 in words is "eighty-three million, four hundred twenty-one thousand, five hundred thirty-seven".