82351979 has 4 divisors (see below), whose sum is σ = 82828176. Its totient is φ = 81875784.

The previous prime is 82351963. The next prime is 82351981. The reversal of 82351979 is 97915328.

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

It is a cyclic number.

It is not a de Polignac number, because 82351979 - 2⁴ = 82351963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82351949) 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, 237839 + ... + 238184.

It is an arithmetic number, because the mean of its divisors is an integer number (20707044).

Almost surely, 2^82351979 is an apocalyptic number.

82351979 is a deficient number, since it is larger than the sum of its proper divisors (476197).

82351979 is a wasteful number, since it uses less digits than its factorization.

82351979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476196.

The product of its digits is 136080, while the sum is 44.

The square root of 82351979 is about 9074.7991162339. The cubic root of 82351979 is about 435.0688735796.

The spelling of 82351979 in words is "eighty-two million, three hundred fifty-one thousand, nine hundred seventy-nine".