82015949 has 4 divisors (see below), whose sum is σ = 84016380. Its totient is φ = 80015520.

The previous prime is 82015943. The next prime is 82015961. The reversal of 82015949 is 94951028.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2271049 + 79744900 = 1507^2 + 8930^2 .

It is a cyclic number.

It is not a de Polignac number, because 82015949 - 2⁴ = 82015933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82015943) 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, 1000154 + ... + 1000235.

It is an arithmetic number, because the mean of its divisors is an integer number (21004095).

Almost surely, 2^82015949 is an apocalyptic number.

It is an amenable number.

82015949 is a deficient number, since it is larger than the sum of its proper divisors (2000431).

82015949 is a wasteful number, since it uses less digits than its factorization.

82015949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000430.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 82015949 is about 9056.2657315253. The cubic root of 82015949 is about 434.4763134725.

The spelling of 82015949 in words is "eighty-two million, fifteen thousand, nine hundred forty-nine".