87782459 has 2 divisors, whose sum is σ = 87782460. Its totient is φ = 87782458.

The previous prime is 87782447. The next prime is 87782521. The reversal of 87782459 is 95428778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87782459 - 2¹² = 87778363 is a prime.

It is not a weakly prime, because it can be changed into another prime (87787459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43891229 + 43891230.

It is an arithmetic number, because the mean of its divisors is an integer number (43891230).

Almost surely, 2^87782459 is an apocalyptic number.

87782459 is a deficient number, since it is larger than the sum of its proper divisors (1).

87782459 is an equidigital number, since it uses as much as digits as its factorization.

87782459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 50.

The square root of 87782459 is about 9369.2293706580. The cubic root of 87782459 is about 444.4291953356.

The spelling of 87782459 in words is "eighty-seven million, seven hundred eighty-two thousand, four hundred fifty-nine".