7973881 has 2 divisors, whose sum is σ = 7973882. Its totient is φ = 7973880.

The previous prime is 7973837. The next prime is 7973899. The reversal of 7973881 is 1883797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6325225 + 1648656 = 2515^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 7973881 - 2¹¹ = 7971833 is a prime.

It is a super-2 number, since 2×7973881² = 127165556404322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7973281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986940 + 3986941.

It is an arithmetic number, because the mean of its divisors is an integer number (3986941).

Almost surely, 2^7973881 is an apocalyptic number.

It is an amenable number.

7973881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7973881 is an equidigital number, since it uses as much as digits as its factorization.

7973881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 7973881 is about 2823.8061194069. The cubic root of 7973881 is about 199.7821043603.

The spelling of 7973881 in words is "seven million, nine hundred seventy-three thousand, eight hundred eighty-one".