1491842099 has 16 divisors (see below), whose sum is σ = 1694787840. Its totient is φ = 1300740000.

The previous prime is 1491842071. The next prime is 1491842101. The reversal of 1491842099 is 9902481941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491842099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1491842029) 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 15 ways as a sum of consecutive naturals, for example, 32684 + ... + 63654.

It is an arithmetic number, because the mean of its divisors is an integer number (105924240).

Almost surely, 2^1491842099 is an apocalyptic number.

1491842099 is a deficient number, since it is larger than the sum of its proper divisors (202945741).

1491842099 is a wasteful number, since it uses less digits than its factorization.

1491842099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31162.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1491842099 is about 38624.3718266071. The cubic root of 1491842099 is about 1142.6352545097.

The spelling of 1491842099 in words is "one billion, four hundred ninety-one million, eight hundred forty-two thousand, ninety-nine".