82647401 has 4 divisors (see below), whose sum is σ = 82665600. Its totient is φ = 82629204.

The previous prime is 82647379. The next prime is 82647403. The reversal of 82647401 is 10474628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 82647401 - 2¹⁸ = 82385257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82647403) 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, 3980 + ... + 13458.

It is an arithmetic number, because the mean of its divisors is an integer number (20666400).

Almost surely, 2^82647401 is an apocalyptic number.

It is an amenable number.

82647401 is a deficient number, since it is larger than the sum of its proper divisors (18199).

82647401 is an equidigital number, since it uses as much as digits as its factorization.

82647401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18198.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 82647401 is about 9091.0615991753. The cubic root of 82647401 is about 435.5884948966.

The spelling of 82647401 in words is "eighty-two million, six hundred forty-seven thousand, four hundred one".