4491680387 has 2 divisors, whose sum is σ = 4491680388. Its totient is φ = 4491680386.

The previous prime is 4491680363. The next prime is 4491680423. The reversal of 4491680387 is 7830861944.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4491680387 - 2⁸ = 4491680131 is a prime.

It is not a weakly prime, because it can be changed into another prime (4491680357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2245840193 + 2245840194.

It is an arithmetic number, because the mean of its divisors is an integer number (2245840194).

Almost surely, 2^4491680387 is an apocalyptic number.

4491680387 is a deficient number, since it is larger than the sum of its proper divisors (1).

4491680387 is an equidigital number, since it uses as much as digits as its factorization.

4491680387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 4491680387 is about 67019.9999030140. Note that the first 4 decimals coincide. The cubic root of 4491680387 is about 1649.9455613505.

The spelling of 4491680387 in words is "four billion, four hundred ninety-one million, six hundred eighty thousand, three hundred eighty-seven".