1494891819 has 12 divisors (see below), whose sum is σ = 2173782000. Its totient is φ = 989905104.

The previous prime is 1494891817. The next prime is 1494891833. The reversal of 1494891819 is 9181984941.

1494891819 is a `hidden beast` number, since 149 + 489 + 1 + 8 + 19 = 666.

It is not a de Polignac number, because 1494891819 - 2¹ = 1494891817 is a prime.

It is a super-2 number, since 2×1494891819² = 4469403101026257522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1494891817) 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, 556039 + ... + 558720.

It is an arithmetic number, because the mean of its divisors is an integer number (181148500).

Almost surely, 2^1494891819 is an apocalyptic number.

1494891819 is a deficient number, since it is larger than the sum of its proper divisors (678890181).

1494891819 is a wasteful number, since it uses less digits than its factorization.

1494891819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114914 (or 1114911 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 1494891819 is about 38663.8308888294. The cubic root of 1494891819 is about 1143.4133408148.

The spelling of 1494891819 in words is "one billion, four hundred ninety-four million, eight hundred ninety-one thousand, eight hundred nineteen".