1091949293 has 2 divisors, whose sum is σ = 1091949294. Its totient is φ = 1091949292.

The previous prime is 1091949259. The next prime is 1091949307. The reversal of 1091949293 is 3929491901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553802089 + 538147204 = 23533^2 + 23198^2 .

It is an emirp because it is prime and its reverse (3929491901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1091949293 - 2⁸ = 1091949037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091949193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545974646 + 545974647.

It is an arithmetic number, because the mean of its divisors is an integer number (545974647).

Almost surely, 2^1091949293 is an apocalyptic number.

It is an amenable number.

1091949293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091949293 is an equidigital number, since it uses as much as digits as its factorization.

1091949293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 1091949293 is about 33044.6560429973. The cubic root of 1091949293 is about 1029.7555875282.

The spelling of 1091949293 in words is "one billion, ninety-one million, nine hundred forty-nine thousand, two hundred ninety-three".