1197194819 has 2 divisors, whose sum is σ = 1197194820. Its totient is φ = 1197194818.

The previous prime is 1197194813. The next prime is 1197194821. The reversal of 1197194819 is 9184917911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1197194819 is a prime.

It is a super-2 number, since 2×1197194819² = 2866550869280885522, which contains 22 as substring.

Together with 1197194821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1197194813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598597409 + 598597410.

It is an arithmetic number, because the mean of its divisors is an integer number (598597410).

Almost surely, 2^1197194819 is an apocalyptic number.

1197194819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197194819 is an equidigital number, since it uses as much as digits as its factorization.

1197194819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 50.

The square root of 1197194819 is about 34600.5031610813. The cubic root of 1197194819 is about 1061.8298815561.

The spelling of 1197194819 in words is "one billion, one hundred ninety-seven million, one hundred ninety-four thousand, eight hundred nineteen".