7881073 has 2 divisors, whose sum is σ = 7881074. Its totient is φ = 7881072.

The previous prime is 7881059. The next prime is 7881077. The reversal of 7881073 is 3701887.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5841889 + 2039184 = 2417^2 + 1428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7881073 is a prime.

It is a super-2 number, since 2×7881073² = 124222623262658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7881077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3940536 + 3940537.

It is an arithmetic number, because the mean of its divisors is an integer number (3940537).

Almost surely, 2^7881073 is an apocalyptic number.

It is an amenable number.

7881073 is a deficient number, since it is larger than the sum of its proper divisors (1).

7881073 is an equidigital number, since it uses as much as digits as its factorization.

7881073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 7881073 is about 2807.3248832296. The cubic root of 7881073 is about 199.0039897182.

Adding to 7881073 its product of nonzero digits (9408), we get a 4-th power (7890481 = 53⁴).

The spelling of 7881073 in words is "seven million, eight hundred eighty-one thousand, seventy-three".