82645249 has 4 divisors (see below), whose sum is σ = 82742320. Its totient is φ = 82548180.

The previous prime is 82645229. The next prime is 82645267. The reversal of 82645249 is 94254628.

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.

It is a cyclic number.

It is not a de Polignac number, because 82645249 - 2¹¹ = 82643201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82645229) 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, 47247 + ... + 48964.

It is an arithmetic number, because the mean of its divisors is an integer number (20685580).

Almost surely, 2^82645249 is an apocalyptic number.

It is an amenable number.

82645249 is a deficient number, since it is larger than the sum of its proper divisors (97071).

82645249 is an equidigital number, since it uses as much as digits as its factorization.

82645249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97070.

The product of its digits is 138240, while the sum is 40.

The square root of 82645249 is about 9090.9432403904. The cubic root of 82645249 is about 435.5847141987.

The spelling of 82645249 in words is "eighty-two million, six hundred forty-five thousand, two hundred forty-nine".