82478977 has 8 divisors (see below), whose sum is σ = 95553536. Its totient is φ = 69727392.

The previous prime is 82478953. The next prime is 82478983. The reversal of 82478977 is 77987428.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-82478977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82478947) 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, 80193 + ... + 81214.

It is an arithmetic number, because the mean of its divisors is an integer number (11944192).

Almost surely, 2^82478977 is an apocalyptic number.

It is an amenable number.

82478977 is a deficient number, since it is larger than the sum of its proper divisors (13074559).

82478977 is a wasteful number, since it uses less digits than its factorization.

82478977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161487.

The product of its digits is 1580544, while the sum is 52.

The square root of 82478977 is about 9081.7937104957. The cubic root of 82478977 is about 435.2924039238.

The spelling of 82478977 in words is "eighty-two million, four hundred seventy-eight thousand, nine hundred seventy-seven".