82641397 has 4 divisors (see below), whose sum is σ = 83996236. Its totient is φ = 81286560.

The previous prime is 82641379. The next prime is 82641407. The reversal of 82641397 is 79314628.

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 11930116 + 70711281 = 3454^2 + 8409^2 .

It is a cyclic number.

It is not a de Polignac number, because 82641397 - 2¹⁵ = 82608629 is a prime.

It is a super-3 number, since 3×82641397³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82641497) 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, 677328 + ... + 677449.

It is an arithmetic number, because the mean of its divisors is an integer number (20999059).

Almost surely, 2^82641397 is an apocalyptic number.

It is an amenable number.

82641397 is a deficient number, since it is larger than the sum of its proper divisors (1354839).

82641397 is a wasteful number, since it uses less digits than its factorization.

82641397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354838.

The product of its digits is 72576, while the sum is 40.

The square root of 82641397 is about 9090.7313787176. The cubic root of 82641397 is about 435.5779467260.

It can be divided in two parts, 82641 and 397, that added together give a palindrome (83038).

The spelling of 82641397 in words is "eighty-two million, six hundred forty-one thousand, three hundred ninety-seven".