87862993 has 2 divisors, whose sum is σ = 87862994. Its totient is φ = 87862992.

The previous prime is 87862979. The next prime is 87863099. The reversal of 87862993 is 39926878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63489024 + 24373969 = 7968^2 + 4937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87862993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87862993.

It is not a weakly prime, because it can be changed into another prime (87862933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43931496 + 43931497.

It is an arithmetic number, because the mean of its divisors is an integer number (43931497).

Almost surely, 2^87862993 is an apocalyptic number.

It is an amenable number.

87862993 is a deficient number, since it is larger than the sum of its proper divisors (1).

87862993 is an equidigital number, since it uses as much as digits as its factorization.

87862993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 87862993 is about 9373.5261774852. The cubic root of 87862993 is about 444.5650642453.

The spelling of 87862993 in words is "eighty-seven million, eight hundred sixty-two thousand, nine hundred ninety-three".