1185948091 has 2 divisors, whose sum is σ = 1185948092. Its totient is φ = 1185948090.

The previous prime is 1185948047. The next prime is 1185948097. The reversal of 1185948091 is 1908495811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1185948091 - 2⁷ = 1185947963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1185948097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592974045 + 592974046.

It is an arithmetic number, because the mean of its divisors is an integer number (592974046).

Almost surely, 2^1185948091 is an apocalyptic number.

1185948091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185948091 is an equidigital number, since it uses as much as digits as its factorization.

1185948091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 46.

The square root of 1185948091 is about 34437.5970561246. The cubic root of 1185948091 is about 1058.4943888045.

The spelling of 1185948091 in words is "one billion, one hundred eighty-five million, nine hundred forty-eight thousand, ninety-one".