83821694 has 8 divisors (see below), whose sum is σ = 137162808. Its totient is φ = 38100760.

The previous prime is 83821693. The next prime is 83821697. The reversal of 83821694 is 49612838.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83821693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905017 + ... + 1905060.

It is an arithmetic number, because the mean of its divisors is an integer number (17145351).

Almost surely, 2^83821694 is an apocalyptic number.

83821694 is a deficient number, since it is larger than the sum of its proper divisors (53341114).

83821694 is a wasteful number, since it uses less digits than its factorization.

83821694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810090.

The product of its digits is 82944, while the sum is 41.

The square root of 83821694 is about 9155.4188325822. The cubic root of 83821694 is about 437.6418156853.

Subtracting from 83821694 its reverse (49612838), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 83821694 in words is "eighty-three million, eight hundred twenty-one thousand, six hundred ninety-four".