1331916049 has 4 divisors (see below), whose sum is σ = 1334075364. Its totient is φ = 1329756736.

The previous prime is 1331916007. The next prime is 1331916059. The reversal of 1331916049 is 9406191331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144769024 + 1187147025 = 12032^2 + 34455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331916049 - 2⁹ = 1331915537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331915999 and 1331916017.

It is not an unprimeable number, because it can be changed into a prime (1331916059) 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, 1078732 + ... + 1079965.

It is an arithmetic number, because the mean of its divisors is an integer number (333518841).

Almost surely, 2^1331916049 is an apocalyptic number.

It is an amenable number.

1331916049 is a deficient number, since it is larger than the sum of its proper divisors (2159315).

1331916049 is an equidigital number, since it uses as much as digits as its factorization.

1331916049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159314.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1331916049 is about 36495.4250420515. The cubic root of 1331916049 is about 1100.2522972248.

The spelling of 1331916049 in words is "one billion, three hundred thirty-one million, nine hundred sixteen thousand, forty-nine".