83217901 has 4 divisors (see below), whose sum is σ = 89619292. Its totient is φ = 76816512.

The previous prime is 83217877. The next prime is 83217931. The reversal of 83217901 is 10971238.

83217901 = 6450² + 6451².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10971238 = 2 ⋅5485619.

It can be written as a sum of positive squares in 2 ways, for example, as 41615401 + 41602500 = 6451^2 + 6450^2 .

It is a cyclic number.

It is not a de Polignac number, because 83217901 - 2⁹ = 83217389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83217931) 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, 3200676 + ... + 3200701.

It is an arithmetic number, because the mean of its divisors is an integer number (22404823).

Almost surely, 2^83217901 is an apocalyptic number.

83217901 is the 6451-st centered square number.

It is an amenable number.

83217901 is a deficient number, since it is larger than the sum of its proper divisors (6401391).

83217901 is a wasteful number, since it uses less digits than its factorization.

83217901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401390.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 83217901 is about 9122.3846114928. The cubic root of 83217901 is about 436.5884603126.

The spelling of 83217901 in words is "eighty-three million, two hundred seventeen thousand, nine hundred one".