1493449991 has 4 divisors (see below), whose sum is σ = 1629218184. Its totient is φ = 1357681800.

The previous prime is 1493449973. The next prime is 1493450009. The reversal of 1493449991 is 1999443941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1493449973) and next prime (1493450009).

It is a cyclic number.

It is not a de Polignac number, because 1493449991 - 2¹⁴ = 1493433607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493449931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67884080 + ... + 67884101.

It is an arithmetic number, because the mean of its divisors is an integer number (407304546).

Almost surely, 2^1493449991 is an apocalyptic number.

1493449991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1493449991 is a deficient number, since it is larger than the sum of its proper divisors (135768193).

1493449991 is a wasteful number, since it uses less digits than its factorization.

1493449991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135768192.

The product of its digits is 1259712, while the sum is 53.

The square root of 1493449991 is about 38645.1806956573. The cubic root of 1493449991 is about 1143.0456139417.

The spelling of 1493449991 in words is "one billion, four hundred ninety-three million, four hundred forty-nine thousand, nine hundred ninety-one".