86699761 has 2 divisors, whose sum is σ = 86699762. Its totient is φ = 86699760.

The previous prime is 86699759. The next prime is 86699771. The reversal of 86699761 is 16799668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85211361 + 1488400 = 9231^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 86699761 - 2¹ = 86699759 is a prime.

Together with 86699759, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 86699699 and 86699708.

It is not a weakly prime, because it can be changed into another prime (86699731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43349880 + 43349881.

It is an arithmetic number, because the mean of its divisors is an integer number (43349881).

Almost surely, 2^86699761 is an apocalyptic number.

It is an amenable number.

86699761 is a deficient number, since it is larger than the sum of its proper divisors (1).

86699761 is an equidigital number, since it uses as much as digits as its factorization.

86699761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 86699761 is about 9311.2706436877. The cubic root of 86699761 is about 442.5944531154.

The spelling of 86699761 in words is "eighty-six million, six hundred ninety-nine thousand, seven hundred sixty-one".