1198799947 has 2 divisors, whose sum is σ = 1198799948. Its totient is φ = 1198799946.

The previous prime is 1198799933. The next prime is 1198799969. The reversal of 1198799947 is 7499978911.

It is a weak prime.

It is an emirp because it is prime and its reverse (7499978911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1198799947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198799747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599399973 + 599399974.

It is an arithmetic number, because the mean of its divisors is an integer number (599399974).

Almost surely, 2^1198799947 is an apocalyptic number.

1198799947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198799947 is an equidigital number, since it uses as much as digits as its factorization.

1198799947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 64.

The square root of 1198799947 is about 34623.6905456365. The cubic root of 1198799947 is about 1062.3042158656.

The spelling of 1198799947 in words is "one billion, one hundred ninety-eight million, seven hundred ninety-nine thousand, nine hundred forty-seven".