7973861 has 4 divisors (see below), whose sum is σ = 9112992. Its totient is φ = 6834732.

The previous prime is 7973837. The next prime is 7973881. The reversal of 7973861 is 1683797.

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 an emirpimes, since its reverse is a distinct semiprime: 1683797 = 331 ⋅5087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7973861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7973881) 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, 569555 + ... + 569568.

It is an arithmetic number, because the mean of its divisors is an integer number (2278248).

Almost surely, 2^7973861 is an apocalyptic number.

It is an amenable number.

7973861 is a deficient number, since it is larger than the sum of its proper divisors (1139131).

7973861 is a wasteful number, since it uses less digits than its factorization.

7973861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139130.

The product of its digits is 63504, while the sum is 41.

The square root of 7973861 is about 2823.8025780851. The cubic root of 7973861 is about 199.7819373298.

Subtracting from 7973861 its reverse (1683797), we obtain a square (6290064 = 2508²).

The spelling of 7973861 in words is "seven million, nine hundred seventy-three thousand, eight hundred sixty-one".