1949166867 has 4 divisors (see below), whose sum is σ = 2598889160. Its totient is φ = 1299444576.

The previous prime is 1949166847. The next prime is 1949166883. The reversal of 1949166867 is 7686619491.

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

It is not a de Polignac number, because 1949166867 - 2¹² = 1949162771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949166827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324861142 + ... + 324861147.

It is an arithmetic number, because the mean of its divisors is an integer number (649722290).

Almost surely, 2^1949166867 is an apocalyptic number.

1949166867 is a deficient number, since it is larger than the sum of its proper divisors (649722293).

1949166867 is an equidigital number, since it uses as much as digits as its factorization.

1949166867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649722292.

The product of its digits is 3919104, while the sum is 57.

The square root of 1949166867 is about 44149.3699502043. The cubic root of 1949166867 is about 1249.1550272389.

The spelling of 1949166867 in words is "one billion, nine hundred forty-nine million, one hundred sixty-six thousand, eight hundred sixty-seven".