1493991 has 8 divisors (see below), whose sum is σ = 2213360. Its totient is φ = 995976.

The previous prime is 1493981. The next prime is 1494019. The reversal of 1493991 is 1993941.

It is not a de Polignac number, because 1493991 - 2⁶ = 1493927 is a prime.

It is a Duffinian number.

1493991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27640 + ... + 27693.

It is an arithmetic number, because the mean of its divisors is an integer number (276670).

2^1493991 is an apocalyptic number.

1493991 is a deficient number, since it is larger than the sum of its proper divisors (719369).

1493991 is an equidigital number, since it uses as much as digits as its factorization.

1493991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55342 (or 55336 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 1493991 is about 1222.2892456371. The cubic root of 1493991 is about 114.3183621756.

The spelling of 1493991 in words is "one million, four hundred ninety-three thousand, nine hundred ninety-one".