1349679891 has 16 divisors (see below), whose sum is σ = 2122999808. Its totient is φ = 746366400.

The previous prime is 1349679887. The next prime is 1349679901. The reversal of 1349679891 is 1989769431.

It is not a de Polignac number, because 1349679891 - 2² = 1349679887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349679391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035970 + ... + 1037271.

It is an arithmetic number, because the mean of its divisors is an integer number (132687488).

Almost surely, 2^1349679891 is an apocalyptic number.

1349679891 is a deficient number, since it is larger than the sum of its proper divisors (773319917).

1349679891 is a wasteful number, since it uses less digits than its factorization.

1349679891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073282.

The product of its digits is 2939328, while the sum is 57.

The square root of 1349679891 is about 36737.9897517542. The cubic root of 1349679891 is about 1105.1220877505.

The spelling of 1349679891 in words is "one billion, three hundred forty-nine million, six hundred seventy-nine thousand, eight hundred ninety-one".