1311897914 has 8 divisors (see below), whose sum is σ = 1989957780. Its totient is φ = 648578656.

The previous prime is 1311897913. The next prime is 1311897931. The reversal of 1311897914 is 4197981131.

It can be written as a sum of positive squares in 2 ways, for example, as 1100049889 + 211848025 = 33167^2 + 14555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1311897914² = 3442152273515102792, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311897913) 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, 3684929 + ... + 3685284.

Almost surely, 2^1311897914 is an apocalyptic number.

1311897914 is a deficient number, since it is larger than the sum of its proper divisors (678059866).

1311897914 is an equidigital number, since it uses as much as digits as its factorization.

1311897914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370304.

The product of its digits is 54432, while the sum is 44.

The square root of 1311897914 is about 36220.1313360402. The cubic root of 1311897914 is about 1094.7123404979.

The spelling of 1311897914 in words is "one billion, three hundred eleven million, eight hundred ninety-seven thousand, nine hundred fourteen".