8491060387 has 2 divisors, whose sum is σ = 8491060388. Its totient is φ = 8491060386.

The previous prime is 8491060381. The next prime is 8491060429. The reversal of 8491060387 is 7830601948.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8491060387 is a prime.

It is not a weakly prime, because it can be changed into another prime (8491060381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245530193 + 4245530194.

It is an arithmetic number, because the mean of its divisors is an integer number (4245530194).

Almost surely, 2^8491060387 is an apocalyptic number.

8491060387 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491060387 is an equidigital number, since it uses as much as digits as its factorization.

8491060387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 8491060387 is about 92146.9499603758. The cubic root of 8491060387 is about 2040.1118408342. Note that the first 3 decimals are identical.

The spelling of 8491060387 in words is "eight billion, four hundred ninety-one million, sixty thousand, three hundred eighty-seven".