87145963 has 2 divisors, whose sum is σ = 87145964. Its totient is φ = 87145962.

The previous prime is 87145909. The next prime is 87145969. The reversal of 87145963 is 36954178.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87145963 is a prime.

It is not a weakly prime, because it can be changed into another prime (87145969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43572981 + 43572982.

It is an arithmetic number, because the mean of its divisors is an integer number (43572982).

Almost surely, 2^87145963 is an apocalyptic number.

87145963 is a deficient number, since it is larger than the sum of its proper divisors (1).

87145963 is an equidigital number, since it uses as much as digits as its factorization.

87145963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 87145963 is about 9335.2002121004. The cubic root of 87145963 is about 443.3524279312.

The spelling of 87145963 in words is "eighty-seven million, one hundred forty-five thousand, nine hundred sixty-three".