82981951 has 4 divisors (see below), whose sum is σ = 89365192. Its totient is φ = 76598712.

The previous prime is 82981933. The next prime is 82981967. The reversal of 82981951 is 15918928.

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 82981951 - 2¹⁵ = 82949183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82981898 and 82981907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82981901) 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, 3191601 + ... + 3191626.

It is an arithmetic number, because the mean of its divisors is an integer number (22341298).

Almost surely, 2^82981951 is an apocalyptic number.

82981951 is a deficient number, since it is larger than the sum of its proper divisors (6383241).

82981951 is a wasteful number, since it uses less digits than its factorization.

82981951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383240.

The product of its digits is 51840, while the sum is 43.

The square root of 82981951 is about 9109.4429577225. The cubic root of 82981951 is about 436.1754459723.

The spelling of 82981951 in words is "eighty-two million, nine hundred eighty-one thousand, nine hundred fifty-one".