86838769 has 2 divisors, whose sum is σ = 86838770. Its totient is φ = 86838768.

The previous prime is 86838761. The next prime is 86838793. The reversal of 86838769 is 96783868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85655025 + 1183744 = 9255^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 86838769 - 2³ = 86838761 is a prime.

It is a super-2 number, since 2×86838769² = 15081943602870722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86838761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43419384 + 43419385.

It is an arithmetic number, because the mean of its divisors is an integer number (43419385).

Almost surely, 2^86838769 is an apocalyptic number.

It is an amenable number.

86838769 is a deficient number, since it is larger than the sum of its proper divisors (1).

86838769 is an equidigital number, since it uses as much as digits as its factorization.

86838769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 55.

The square root of 86838769 is about 9318.7321562539. The cubic root of 86838769 is about 442.8308679075.

The spelling of 86838769 in words is "eighty-six million, eight hundred thirty-eight thousand, seven hundred sixty-nine".