1198007491 has 2 divisors, whose sum is σ = 1198007492. Its totient is φ = 1198007490.

The previous prime is 1198007411. The next prime is 1198007519. The reversal of 1198007491 is 1947008911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1198007491 - 2²³ = 1189618883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198007411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599003745 + 599003746.

It is an arithmetic number, because the mean of its divisors is an integer number (599003746).

Almost surely, 2^1198007491 is an apocalyptic number.

1198007491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198007491 is an equidigital number, since it uses as much as digits as its factorization.

1198007491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1198007491 is about 34612.2448130716. The cubic root of 1198007491 is about 1062.0700886969.

The spelling of 1198007491 in words is "one billion, one hundred ninety-eight million, seven thousand, four hundred ninety-one".