1672791139 has 4 divisors (see below), whose sum is σ = 1673214480. Its totient is φ = 1672367800.

The previous prime is 1672791101. The next prime is 1672791167. The reversal of 1672791139 is 9311972761.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672791139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672791199) 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, 205687 + ... + 213664.

It is an arithmetic number, because the mean of its divisors is an integer number (418303620).

Almost surely, 2^1672791139 is an apocalyptic number.

1672791139 is a deficient number, since it is larger than the sum of its proper divisors (423341).

1672791139 is an equidigital number, since it uses as much as digits as its factorization.

1672791139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423340.

The product of its digits is 142884, while the sum is 46.

The square root of 1672791139 is about 40899.7694247779. The cubic root of 1672791139 is about 1187.0815992140.

The spelling of 1672791139 in words is "one billion, six hundred seventy-two million, seven hundred ninety-one thousand, one hundred thirty-nine".