1331604743 has 6 divisors (see below), whose sum is σ = 1549009656. Its totient is φ = 1141375452.

The previous prime is 1331604737. The next prime is 1331604749. The reversal of 1331604743 is 3474061331.

It is an interprime number because it is at equal distance from previous prime (1331604737) and next prime (1331604749).

It is not a de Polignac number, because 1331604743 - 2¹⁸ = 1331342599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331604749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13587755 + ... + 13587852.

It is an arithmetic number, because the mean of its divisors is an integer number (258168276).

Almost surely, 2^1331604743 is an apocalyptic number.

1331604743 is a deficient number, since it is larger than the sum of its proper divisors (217404913).

1331604743 is an equidigital number, since it uses as much as digits as its factorization.

1331604743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27175621 (or 27175614 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 1331604743 is about 36491.1597924758. The cubic root of 1331604743 is about 1100.1665706431.

The spelling of 1331604743 in words is "one billion, three hundred thirty-one million, six hundred four thousand, seven hundred forty-three".