1090191249 has 36 divisors (see below), whose sum is σ = 1939585284. Its totient is φ = 586317312.

The previous prime is 1090191247. The next prime is 1090191251. The reversal of 1090191249 is 9421910901.

It is an interprime number because it is at equal distance from previous prime (1090191247) and next prime (1090191251).

It can be written as a sum of positive squares in 2 ways, for example, as 1002862224 + 87329025 = 31668^2 + 9345^2 .

It is not a de Polignac number, because 1090191249 - 2¹ = 1090191247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1090191247) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65212 + ... + 80205.

It is an arithmetic number, because the mean of its divisors is an integer number (53877369).

Almost surely, 2^1090191249 is an apocalyptic number.

It is an amenable number.

1090191249 is a deficient number, since it is larger than the sum of its proper divisors (849394035).

1090191249 is a wasteful number, since it uses less digits than its factorization.

1090191249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145454 (or 145444 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 1090191249 is about 33018.0442939917. The cubic root of 1090191249 is about 1029.2026534086.

The spelling of 1090191249 in words is "one billion, ninety million, one hundred ninety-one thousand, two hundred forty-nine".