7898061947 has 2 divisors, whose sum is σ = 7898061948. Its totient is φ = 7898061946.

The previous prime is 7898061877. The next prime is 7898061971. The reversal of 7898061947 is 7491608987.

It is a strong prime.

It is an emirp because it is prime and its reverse (7491608987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7898061947 - 2²² = 7893867643 is a prime.

It is not a weakly prime, because it can be changed into another prime (7898066947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3949030973 + 3949030974.

It is an arithmetic number, because the mean of its divisors is an integer number (3949030974).

Almost surely, 2^7898061947 is an apocalyptic number.

7898061947 is a deficient number, since it is larger than the sum of its proper divisors (1).

7898061947 is an equidigital number, since it uses as much as digits as its factorization.

7898061947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 7898061947 is about 88871.0411045128. The cubic root of 7898061947 is about 1991.4688235061.

The spelling of 7898061947 in words is "seven billion, eight hundred ninety-eight million, sixty-one thousand, nine hundred forty-seven".