1491119091 has 32 divisors (see below), whose sum is σ = 2754163200. Its totient is φ = 774606240.

The previous prime is 1491119081. The next prime is 1491119093. The reversal of 1491119091 is 1909111941.

It is not a de Polignac number, because 1491119091 - 2⁵ = 1491119059 is a prime.

It is a super-2 number, since 2×1491119091² = 4446872287089332562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1491119093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356536 + ... + 360693.

It is an arithmetic number, because the mean of its divisors is an integer number (86067600).

Almost surely, 2^1491119091 is an apocalyptic number.

1491119091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1491119091 is a deficient number, since it is larger than the sum of its proper divisors (1263044109).

1491119091 is a wasteful number, since it uses less digits than its factorization.

1491119091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717256 (or 717250 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The square root of 1491119091 is about 38615.0112132575. The cubic root of 1491119091 is about 1142.4506353452.

The spelling of 1491119091 in words is "one billion, four hundred ninety-one million, one hundred nineteen thousand, ninety-one".