83215697 has 4 divisors (see below), whose sum is σ = 88110756. Its totient is φ = 78320640.

The previous prime is 83215667. The next prime is 83215711. The reversal of 83215697 is 79651238.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66601921 + 16613776 = 8161^2 + 4076^2 .

It is a cyclic number.

It is not a de Polignac number, because 83215697 - 2⁸ = 83215441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83215637) 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, 2447504 + ... + 2447537.

It is an arithmetic number, because the mean of its divisors is an integer number (22027689).

Almost surely, 2^83215697 is an apocalyptic number.

It is an amenable number.

83215697 is a deficient number, since it is larger than the sum of its proper divisors (4895059).

83215697 is a wasteful number, since it uses less digits than its factorization.

83215697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895058.

The product of its digits is 90720, while the sum is 41.

The square root of 83215697 is about 9122.2638089457. The cubic root of 83215697 is about 436.5846059757.

The spelling of 83215697 in words is "eighty-three million, two hundred fifteen thousand, six hundred ninety-seven".