82658491 has 4 divisors (see below), whose sum is σ = 82861000. Its totient is φ = 82455984.

The previous prime is 82658489. The next prime is 82658519. The reversal of 82658491 is 19485628.

It is a happy number.

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 82658491 - 2¹ = 82658489 is a prime.

It is a super-2 number, since 2×82658491² = 13664852268794162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82658461) 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, 100641 + ... + 101458.

It is an arithmetic number, because the mean of its divisors is an integer number (20715250).

Almost surely, 2^82658491 is an apocalyptic number.

82658491 is a deficient number, since it is larger than the sum of its proper divisors (202509).

82658491 is a wasteful number, since it uses less digits than its factorization.

82658491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202508.

The product of its digits is 138240, while the sum is 43.

The square root of 82658491 is about 9091.6715184833. The cubic root of 82658491 is about 435.6079770997.

The spelling of 82658491 in words is "eighty-two million, six hundred fifty-eight thousand, four hundred ninety-one".