87782987 has 2 divisors, whose sum is σ = 87782988. Its totient is φ = 87782986.

The previous prime is 87782957. The next prime is 87782993. The reversal of 87782987 is 78928778.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87782987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87782957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43891493 + 43891494.

It is an arithmetic number, because the mean of its divisors is an integer number (43891494).

Almost surely, 2^87782987 is an apocalyptic number.

87782987 is a deficient number, since it is larger than the sum of its proper divisors (1).

87782987 is an equidigital number, since it uses as much as digits as its factorization.

87782987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3161088, while the sum is 56.

The square root of 87782987 is about 9369.2575479597. The cubic root of 87782987 is about 444.4300863950.

The spelling of 87782987 in words is "eighty-seven million, seven hundred eighty-two thousand, nine hundred eighty-seven".