86406997 has 2 divisors, whose sum is σ = 86406998. Its totient is φ = 86406996.

The previous prime is 86406977. The next prime is 86407007. The reversal of 86406997 is 79960468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86378436 + 28561 = 9294^2 + 169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86406997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86406997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86406917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43203498 + 43203499.

It is an arithmetic number, because the mean of its divisors is an integer number (43203499).

Almost surely, 2^86406997 is an apocalyptic number.

It is an amenable number.

86406997 is a deficient number, since it is larger than the sum of its proper divisors (1).

86406997 is an equidigital number, since it uses as much as digits as its factorization.

86406997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 86406997 is about 9295.5364019512. The cubic root of 86406997 is about 442.0957133890.

The spelling of 86406997 in words is "eighty-six million, four hundred six thousand, nine hundred ninety-seven".