86409797 has 2 divisors, whose sum is σ = 86409798. Its totient is φ = 86409796.

The previous prime is 86409773. The next prime is 86409823. The reversal of 86409797 is 79790468.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51351556 + 35058241 = 7166^2 + 5921^2 .

It is a cyclic number.

It is not a de Polignac number, because 86409797 - 2¹² = 86405701 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 (86403797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43204898 + 43204899.

It is an arithmetic number, because the mean of its divisors is an integer number (43204899).

Almost surely, 2^86409797 is an apocalyptic number.

It is an amenable number.

86409797 is a deficient number, since it is larger than the sum of its proper divisors (1).

86409797 is an equidigital number, since it uses as much as digits as its factorization.

86409797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 86409797 is about 9295.6870106518. The cubic root of 86409797 is about 442.1004886760.

The spelling of 86409797 in words is "eighty-six million, four hundred nine thousand, seven hundred ninety-seven".