86647469 has 2 divisors, whose sum is σ = 86647470. Its totient is φ = 86647468.

The previous prime is 86647441. The next prime is 86647471. The reversal of 86647469 is 96474668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73324969 + 13322500 = 8563^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 86647469 - 2¹⁶ = 86581933 is a prime.

It is a super-2 number, since 2×86647469² = 15015567768211922, which contains 22 as substring.

Together with 86647471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86647069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43323734 + 43323735.

It is an arithmetic number, because the mean of its divisors is an integer number (43323735).

Almost surely, 2^86647469 is an apocalyptic number.

It is an amenable number.

86647469 is a deficient number, since it is larger than the sum of its proper divisors (1).

86647469 is an equidigital number, since it uses as much as digits as its factorization.

86647469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The square root of 86647469 is about 9308.4622253088. The cubic root of 86647469 is about 442.5054532402.

The spelling of 86647469 in words is "eighty-six million, six hundred forty-seven thousand, four hundred sixty-nine".