1331439650 has 12 divisors (see below), whose sum is σ = 2476477842. Its totient is φ = 532575840.

The previous prime is 1331439647. The next prime is 1331439653. The reversal of 1331439650 is 569341331.

It is an interprime number because it is at equal distance from previous prime (1331439647) and next prime (1331439653).

It can be written as a sum of positive squares in 3 ways, for example, as 657050689 + 674388961 = 25633^2 + 25969^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331439650.

It is not an unprimeable number, because it can be changed into a prime (1331439653) 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 5 ways as a sum of consecutive naturals, for example, 13314347 + ... + 13314446.

Almost surely, 2^1331439650 is an apocalyptic number.

1331439650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331439650 is a deficient number, since it is larger than the sum of its proper divisors (1145038192).

1331439650 is a wasteful number, since it uses less digits than its factorization.

1331439650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26628805 (or 26628800 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 1331439650 is about 36488.8976265384. The cubic root of 1331439650 is about 1100.1211023695.

The spelling of 1331439650 in words is "one billion, three hundred thirty-one million, four hundred thirty-nine thousand, six hundred fifty".