7825643 has 6 divisors (see below), whose sum is σ = 9103356. Its totient is φ = 6707652.

The previous prime is 7825639. The next prime is 7825651. The reversal of 7825643 is 3465287.

It is a happy number.

It is not a de Polignac number, because 7825643 - 2² = 7825639 is a prime.

It is a super-2 number, since 2×7825643² = 122481376726898, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7 + 8⁵ + 2¹³ + 5⁹ + 6 + 4¹⁰ + 3¹⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7825633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79805 + ... + 79902.

It is an arithmetic number, because the mean of its divisors is an integer number (1517226).

Almost surely, 2^7825643 is an apocalyptic number.

7825643 is a deficient number, since it is larger than the sum of its proper divisors (1277713).

7825643 is a wasteful number, since it uses less digits than its factorization.

7825643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159721 (or 159714 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 7825643 is about 2797.4350752073. The cubic root of 7825643 is about 198.5363396215.

The spelling of 7825643 in words is "seven million, eight hundred twenty-five thousand, six hundred forty-three".