86243887 has 2 divisors, whose sum is σ = 86243888. Its totient is φ = 86243886.

The previous prime is 86243863. The next prime is 86243893. The reversal of 86243887 is 78834268.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86243887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86243837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43121943 + 43121944.

It is an arithmetic number, because the mean of its divisors is an integer number (43121944).

Almost surely, 2^86243887 is an apocalyptic number.

86243887 is a deficient number, since it is larger than the sum of its proper divisors (1).

86243887 is an equidigital number, since it uses as much as digits as its factorization.

86243887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 46.

The square root of 86243887 is about 9286.7586918149. The cubic root of 86243887 is about 441.8173576385.

The spelling of 86243887 in words is "eighty-six million, two hundred forty-three thousand, eight hundred eighty-seven".