87782993 has 2 divisors, whose sum is σ = 87782994. Its totient is φ = 87782992.

The previous prime is 87782987. The next prime is 87783001. The reversal of 87782993 is 39928778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61905424 + 25877569 = 7868^2 + 5087^2 .

It is a cyclic number.

It is not a de Polignac number, because 87782993 - 2¹² = 87778897 is a prime.

It is not a weakly prime, because it can be changed into another prime (87782953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43891496 + 43891497.

It is an arithmetic number, because the mean of its divisors is an integer number (43891497).

Almost surely, 2^87782993 is an apocalyptic number.

It is an amenable number.

87782993 is a deficient number, since it is larger than the sum of its proper divisors (1).

87782993 is an equidigital number, since it uses as much as digits as its factorization.

87782993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The square root of 87782993 is about 9369.2578681558. The cubic root of 87782993 is about 444.4300965206.

The spelling of 87782993 in words is "eighty-seven million, seven hundred eighty-two thousand, nine hundred ninety-three".