1491284199 has 4 divisors (see below), whose sum is σ = 1988378936. Its totient is φ = 994189464.

The previous prime is 1491284107. The next prime is 1491284209. The reversal of 1491284199 is 9914821941.

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

It is not a de Polignac number, because 1491284199 - 2¹⁵ = 1491251431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491284299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248547364 + ... + 248547369.

It is an arithmetic number, because the mean of its divisors is an integer number (497094734).

Almost surely, 2^1491284199 is an apocalyptic number.

1491284199 is a deficient number, since it is larger than the sum of its proper divisors (497094737).

1491284199 is an equidigital number, since it uses as much as digits as its factorization.

1491284199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497094736.

The product of its digits is 186624, while the sum is 48.

The square root of 1491284199 is about 38617.1490273428. The cubic root of 1491284199 is about 1142.4928007182.

The spelling of 1491284199 in words is "one billion, four hundred ninety-one million, two hundred eighty-four thousand, one hundred ninety-nine".