86744797 has 2 divisors, whose sum is σ = 86744798. Its totient is φ = 86744796.

The previous prime is 86744731. The next prime is 86744821. The reversal of 86744797 is 79744768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86508601 + 236196 = 9301^2 + 486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86744797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86742797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43372398 + 43372399.

It is an arithmetic number, because the mean of its divisors is an integer number (43372399).

Almost surely, 2^86744797 is an apocalyptic number.

It is an amenable number.

86744797 is a deficient number, since it is larger than the sum of its proper divisors (1).

86744797 is an equidigital number, since it uses as much as digits as its factorization.

86744797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 52.

The square root of 86744797 is about 9313.6886892359. The cubic root of 86744797 is about 442.6710747548.

The spelling of 86744797 in words is "eighty-six million, seven hundred forty-four thousand, seven hundred ninety-seven".