87856763 has 2 divisors, whose sum is σ = 87856764. Its totient is φ = 87856762.

The previous prime is 87856733. The next prime is 87856781. The reversal of 87856763 is 36765878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87856763 - 2¹⁰ = 87855739 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (87856733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43928381 + 43928382.

It is an arithmetic number, because the mean of its divisors is an integer number (43928382).

Almost surely, 2^87856763 is an apocalyptic number.

87856763 is a deficient number, since it is larger than the sum of its proper divisors (1).

87856763 is an equidigital number, since it uses as much as digits as its factorization.

87856763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 87856763 is about 9373.1938526844. The cubic root of 87856763 is about 444.5545565760.

The spelling of 87856763 in words is "eighty-seven million, eight hundred fifty-six thousand, seven hundred sixty-three".