83218697 has 4 divisors (see below), whose sum is σ = 83513040. Its totient is φ = 82924356.

The previous prime is 83218693. The next prime is 83218699. The reversal of 83218697 is 79681238.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83218697 - 2² = 83218693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83218693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146747 + ... + 147312.

It is an arithmetic number, because the mean of its divisors is an integer number (20878260).

Almost surely, 2^83218697 is an apocalyptic number.

It is an amenable number.

83218697 is a deficient number, since it is larger than the sum of its proper divisors (294343).

83218697 is a wasteful number, since it uses less digits than its factorization.

83218697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294342.

The product of its digits is 145152, while the sum is 44.

The square root of 83218697 is about 9122.4282403316. The cubic root of 83218697 is about 436.5898523340.

The spelling of 83218697 in words is "eighty-three million, two hundred eighteen thousand, six hundred ninety-seven".