987640567 has 2 divisors, whose sum is σ = 987640568. Its totient is φ = 987640566.

The previous prime is 987640561. The next prime is 987640583. The reversal of 987640567 is 765046789.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 987640567 - 2¹⁹ = 987116279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987640561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493820283 + 493820284.

It is an arithmetic number, because the mean of its divisors is an integer number (493820284).

Almost surely, 2^987640567 is an apocalyptic number.

987640567 is a deficient number, since it is larger than the sum of its proper divisors (1).

987640567 is an equidigital number, since it uses as much as digits as its factorization.

987640567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 987640567 is about 31426.7492273700. The cubic root of 987640567 is about 995.8630986468.

The spelling of 987640567 in words is "nine hundred eighty-seven million, six hundred forty thousand, five hundred sixty-seven".