86747761 has 2 divisors, whose sum is σ = 86747762. Its totient is φ = 86747760.

The previous prime is 86747747. The next prime is 86747783. The reversal of 86747761 is 16774768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58232161 + 28515600 = 7631^2 + 5340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86747761 is a prime.

It is not a weakly prime, because it can be changed into another prime (86747741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43373880 + 43373881.

It is an arithmetic number, because the mean of its divisors is an integer number (43373881).

Almost surely, 2^86747761 is an apocalyptic number.

It is an amenable number.

86747761 is a deficient number, since it is larger than the sum of its proper divisors (1).

86747761 is an equidigital number, since it uses as much as digits as its factorization.

86747761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 46.

The square root of 86747761 is about 9313.8478085054. The cubic root of 86747761 is about 442.6761166023.

The spelling of 86747761 in words is "eighty-six million, seven hundred forty-seven thousand, seven hundred sixty-one".