1379491885 has 16 divisors (see below), whose sum is σ = 1663383600. Its totient is φ = 1098280960.

The previous prime is 1379491853. The next prime is 1379491889. The reversal of 1379491885 is 5881949731.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12489156 + 1367002729 = 3534^2 + 36973^2 .

It is not a de Polignac number, because 1379491885 - 2⁵ = 1379491853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379491889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465515 + ... + 1466455.

It is an arithmetic number, because the mean of its divisors is an integer number (103961475).

Almost surely, 2^1379491885 is an apocalyptic number.

It is an amenable number.

1379491885 is a deficient number, since it is larger than the sum of its proper divisors (283891715).

1379491885 is an equidigital number, since it uses as much as digits as its factorization.

1379491885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048.

The product of its digits is 2177280, while the sum is 55.

The square root of 1379491885 is about 37141.5116143649. The cubic root of 1379491885 is about 1113.1996215428.

The spelling of 1379491885 in words is "one billion, three hundred seventy-nine million, four hundred ninety-one thousand, eight hundred eighty-five".