1491371199 has 12 divisors (see below), whose sum is σ = 2267582200. Its totient is φ = 941918544.

The previous prime is 1491371183. The next prime is 1491371201. The reversal of 1491371199 is 9911731941.

1491371199 is a `hidden beast` number, since 1 + 4 + 91 + 371 + 199 = 666.

1491371199 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1491371199 - 2⁴ = 1491371183 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 (1491371179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4360564 + ... + 4360905.

Almost surely, 2^1491371199 is an apocalyptic number.

1491371199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1491371199 is a deficient number, since it is larger than the sum of its proper divisors (776211001).

1491371199 is a wasteful number, since it uses less digits than its factorization.

1491371199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8721494 (or 8721491 counting only the distinct ones).

The product of its digits is 61236, while the sum is 45.

The square root of 1491371199 is about 38618.2754534689. The cubic root of 1491371199 is about 1142.5150175746.

The spelling of 1491371199 in words is "one billion, four hundred ninety-one million, three hundred seventy-one thousand, one hundred ninety-nine".