82081377 has 16 divisors (see below), whose sum is σ = 138974080. Its totient is φ = 46903536.

The previous prime is 82081369. The next prime is 82081379. The reversal of 82081377 is 77318028.

It is not a de Polignac number, because 82081377 - 2³ = 82081369 is a prime.

It is a super-2 number, since 2×82081377² = 13474704900432258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82081379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216958 + ... + 217335.

It is an arithmetic number, because the mean of its divisors is an integer number (8685880).

Almost surely, 2^82081377 is an apocalyptic number.

It is an amenable number.

82081377 is a deficient number, since it is larger than the sum of its proper divisors (56892703).

82081377 is a wasteful number, since it uses less digits than its factorization.

82081377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434309 (or 434303 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 82081377 is about 9059.8773170502. The cubic root of 82081377 is about 434.5918168625.

The spelling of 82081377 in words is "eighty-two million, eighty-one thousand, three hundred seventy-seven".