82979949 has 8 divisors (see below), whose sum is σ = 119150752. Its totient is φ = 51064560.

The previous prime is 82979917. The next prime is 82979959. The reversal of 82979949 is 94997928.

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

It is not a de Polignac number, because 82979949 - 2⁵ = 82979917 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 (82979909) 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, 1063807 + ... + 1063884.

It is an arithmetic number, because the mean of its divisors is an integer number (14893844).

Almost surely, 2^82979949 is an apocalyptic number.

It is an amenable number.

82979949 is a deficient number, since it is larger than the sum of its proper divisors (36170803).

82979949 is a wasteful number, since it uses less digits than its factorization.

82979949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127707.

The product of its digits is 2939328, while the sum is 57.

The square root of 82979949 is about 9109.3330710870. Note that the first 3 decimals coincide. The cubic root of 82979949 is about 436.1719382607.

The spelling of 82979949 in words is "eighty-two million, nine hundred seventy-nine thousand, nine hundred forty-nine".