8139797 has 2 divisors, whose sum is σ = 8139798. Its totient is φ = 8139796.

The previous prime is 8139773. The next prime is 8139829. The reversal of 8139797 is 7979318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8031556 + 108241 = 2834^2 + 329^2 .

It is a cyclic number.

It is not a de Polignac number, because 8139797 - 2⁸ = 8139541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8139707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069898 + 4069899.

It is an arithmetic number, because the mean of its divisors is an integer number (4069899).

Almost surely, 2^8139797 is an apocalyptic number.

It is an amenable number.

8139797 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139797 is an equidigital number, since it uses as much as digits as its factorization.

8139797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 44.

The square root of 8139797 is about 2853.0329475840. The cubic root of 8139797 is about 201.1582542862.

The spelling of 8139797 in words is "eight million, one hundred thirty-nine thousand, seven hundred ninety-seven".