87242863 has 2 divisors, whose sum is σ = 87242864. Its totient is φ = 87242862.

The previous prime is 87242849. The next prime is 87242899. The reversal of 87242863 is 36824278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87242863 - 2¹³ = 87234671 is a prime.

It is a super-2 number, since 2×87242863² = 15222634288873538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87242843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43621431 + 43621432.

It is an arithmetic number, because the mean of its divisors is an integer number (43621432).

Almost surely, 2^87242863 is an apocalyptic number.

87242863 is a deficient number, since it is larger than the sum of its proper divisors (1).

87242863 is an equidigital number, since it uses as much as digits as its factorization.

87242863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 40.

The square root of 87242863 is about 9340.3888034707. The cubic root of 87242863 is about 443.5166923274.

The spelling of 87242863 in words is "eighty-seven million, two hundred forty-two thousand, eight hundred sixty-three".