7822649 has 4 divisors (see below), whose sum is σ = 7875300. Its totient is φ = 7770000.

The previous prime is 7822627. The next prime is 7822657. The reversal of 7822649 is 9462287.

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 1537600 + 6285049 = 1240^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 7822649 - 2²⁰ = 6774073 is a prime.

It is a super-2 number, since 2×7822649² = 122387674754402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7822679) 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, 26102 + ... + 26399.

It is an arithmetic number, because the mean of its divisors is an integer number (1968825).

Almost surely, 2^7822649 is an apocalyptic number.

It is an amenable number.

7822649 is a deficient number, since it is larger than the sum of its proper divisors (52651).

7822649 is a wasteful number, since it uses less digits than its factorization.

7822649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52650.

The product of its digits is 48384, while the sum is 38.

The square root of 7822649 is about 2796.8998909507. The cubic root of 7822649 is about 198.5110171603.

The spelling of 7822649 in words is "seven million, eight hundred twenty-two thousand, six hundred forty-nine".