82420957 has 4 divisors (see below), whose sum is σ = 83150460. Its totient is φ = 81691456.

The previous prime is 82420889. The next prime is 82420967. The reversal of 82420957 is 75902428.

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 38675961 + 43744996 = 6219^2 + 6614^2 .

It is a cyclic number.

It is not a de Polignac number, because 82420957 - 2⁷ = 82420829 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 (82420967) 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, 364582 + ... + 364807.

It is an arithmetic number, because the mean of its divisors is an integer number (20787615).

Almost surely, 2^82420957 is an apocalyptic number.

It is an amenable number.

82420957 is a deficient number, since it is larger than the sum of its proper divisors (729503).

82420957 is a wasteful number, since it uses less digits than its factorization.

82420957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729502.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 82420957 is about 9078.5988456369. The cubic root of 82420957 is about 435.1903108791.

The spelling of 82420957 in words is "eighty-two million, four hundred twenty thousand, nine hundred fifty-seven".