1194417491 has 2 divisors, whose sum is σ = 1194417492. Its totient is φ = 1194417490.

The previous prime is 1194417481. The next prime is 1194417527. The reversal of 1194417491 is 1947144911.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1947144911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1194417491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1194417401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597208745 + 597208746.

It is an arithmetic number, because the mean of its divisors is an integer number (597208746).

Almost surely, 2^1194417491 is an apocalyptic number.

1194417491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194417491 is an equidigital number, since it uses as much as digits as its factorization.

1194417491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 1194417491 is about 34560.3456435262. The cubic root of 1194417491 is about 1061.0081458280.

The spelling of 1194417491 in words is "one billion, one hundred ninety-four million, four hundred seventeen thousand, four hundred ninety-one".