86806469 has 2 divisors, whose sum is σ = 86806470. Its totient is φ = 86806468.

The previous prime is 86806451. The next prime is 86806493. The reversal of 86806469 is 96460868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46648900 + 40157569 = 6830^2 + 6337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86806469 is a prime.

It is a super-2 number, since 2×86806469² = 15070726120495922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86806409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43403234 + 43403235.

It is an arithmetic number, because the mean of its divisors is an integer number (43403235).

Almost surely, 2^86806469 is an apocalyptic number.

It is an amenable number.

86806469 is a deficient number, since it is larger than the sum of its proper divisors (1).

86806469 is an equidigital number, since it uses as much as digits as its factorization.

86806469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 86806469 is about 9316.9989266931. The cubic root of 86806469 is about 442.7759569079.

The spelling of 86806469 in words is "eighty-six million, eight hundred six thousand, four hundred sixty-nine".