7691861 has 2 divisors, whose sum is σ = 7691862. Its totient is φ = 7691860.

The previous prime is 7691851. The next prime is 7691863. The reversal of 7691861 is 1681967.

7691861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7187761 + 504100 = 2681^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 7691861 - 2¹⁴ = 7675477 is a prime.

Together with 7691863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7691863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845930 + 3845931.

It is an arithmetic number, because the mean of its divisors is an integer number (3845931).

Almost surely, 2^7691861 is an apocalyptic number.

It is an amenable number.

7691861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7691861 is an equidigital number, since it uses as much as digits as its factorization.

7691861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 7691861 is about 2773.4204513561. The cubic root of 7691861 is about 197.3984822503.

The spelling of 7691861 in words is "seven million, six hundred ninety-one thousand, eight hundred sixty-one".