86785973 has 2 divisors, whose sum is σ = 86785974. Its totient is φ = 86785972.

The previous prime is 86785961. The next prime is 86785987. The reversal of 86785973 is 37958768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62362609 + 24423364 = 7897^2 + 4942^2 .

It is a cyclic number.

It is not a de Polignac number, because 86785973 - 2¹⁶ = 86720437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86785913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43392986 + 43392987.

It is an arithmetic number, because the mean of its divisors is an integer number (43392987).

Almost surely, 2^86785973 is an apocalyptic number.

It is an amenable number.

86785973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86785973 is an equidigital number, since it uses as much as digits as its factorization.

86785973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 86785973 is about 9315.8989367640. The cubic root of 86785973 is about 442.7411060093.

The spelling of 86785973 in words is "eighty-six million, seven hundred eighty-five thousand, nine hundred seventy-three".