82135919 has 4 divisors (see below), whose sum is σ = 82221480. Its totient is φ = 82050360.

The previous prime is 82135913. The next prime is 82135943. The reversal of 82135919 is 91953128.

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

It is a cyclic number.

It is not a de Polignac number, because 82135919 - 2⁸ = 82135663 is a prime.

It is a super-2 number, since 2×82135919² = 13492618379949122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82135913) 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, 41324 + ... + 43265.

It is an arithmetic number, because the mean of its divisors is an integer number (20555370).

Almost surely, 2^82135919 is an apocalyptic number.

82135919 is a deficient number, since it is larger than the sum of its proper divisors (85561).

82135919 is an equidigital number, since it uses as much as digits as its factorization.

82135919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85560.

The product of its digits is 19440, while the sum is 38.

The square root of 82135919 is about 9062.8869020859. The cubic root of 82135919 is about 434.6880557393.

The spelling of 82135919 in words is "eighty-two million, one hundred thirty-five thousand, nine hundred nineteen".