7850449987 has 2 divisors, whose sum is σ = 7850449988. Its totient is φ = 7850449986.

The previous prime is 7850449979. The next prime is 7850450033. The reversal of 7850449987 is 7899440587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7850449987 - 2³ = 7850449979 is a prime.

It is not a weakly prime, because it can be changed into another prime (7850449787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3925224993 + 3925224994.

It is an arithmetic number, because the mean of its divisors is an integer number (3925224994).

Almost surely, 2^7850449987 is an apocalyptic number.

7850449987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7850449987 is an equidigital number, since it uses as much as digits as its factorization.

7850449987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The square root of 7850449987 is about 88602.7651205085. The cubic root of 7850449987 is about 1987.4590252592.

The spelling of 7850449987 in words is "seven billion, eight hundred fifty million, four hundred forty-nine thousand, nine hundred eighty-seven".