83212091 has 8 divisors (see below), whose sum is σ = 89631744. Its totient is φ = 77025960.

The previous prime is 83212069. The next prime is 83212097. The reversal of 83212091 is 19021238.

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

It is a cyclic number.

It is not a de Polignac number, because 83212091 - 2¹⁰ = 83211067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83212091.

It is not an unprimeable number, because it can be changed into a prime (83212097) 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, 57641 + ... + 59066.

It is an arithmetic number, because the mean of its divisors is an integer number (11203968).

Almost surely, 2^83212091 is an apocalyptic number.

83212091 is a deficient number, since it is larger than the sum of its proper divisors (6419653).

83212091 is a wasteful number, since it uses less digits than its factorization.

83212091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116761.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 83212091 is about 9122.0661584972. The cubic root of 83212091 is about 436.5782996862.

The spelling of 83212091 in words is "eighty-three million, two hundred twelve thousand, ninety-one".