86823031 has 2 divisors, whose sum is σ = 86823032. Its totient is φ = 86823030.

The previous prime is 86823017. The next prime is 86823047. The reversal of 86823031 is 13032868.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86823031 is a prime.

It is a super-2 number, since 2×86823031² = 15076477424053922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86822984 and 86823002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86823731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43411515 + 43411516.

It is an arithmetic number, because the mean of its divisors is an integer number (43411516).

Almost surely, 2^86823031 is an apocalyptic number.

86823031 is a deficient number, since it is larger than the sum of its proper divisors (1).

86823031 is an equidigital number, since it uses as much as digits as its factorization.

86823031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 86823031 is about 9317.8876898147. The cubic root of 86823031 is about 442.8041145217.

Adding to 86823031 its reverse (13032868), we get a palindrome (99855899).

The spelling of 86823031 in words is "eighty-six million, eight hundred twenty-three thousand, thirty-one".