7861897 has 2 divisors, whose sum is σ = 7861898. Its totient is φ = 7861896.

The previous prime is 7861853. The next prime is 7861907. The reversal of 7861897 is 7981687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5659641 + 2202256 = 2379^2 + 1484^2 .

It is a cyclic number.

It is not a de Polignac number, because 7861897 - 2¹¹ = 7859849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7861807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3930948 + 3930949.

It is an arithmetic number, because the mean of its divisors is an integer number (3930949).

Almost surely, 2^7861897 is an apocalyptic number.

It is an amenable number.

7861897 is a deficient number, since it is larger than the sum of its proper divisors (1).

7861897 is an equidigital number, since it uses as much as digits as its factorization.

7861897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 46.

The square root of 7861897 is about 2803.9074521104. The cubic root of 7861897 is about 198.8424550400.

The spelling of 7861897 in words is "seven million, eight hundred sixty-one thousand, eight hundred ninety-seven".