1331694357 has 16 divisors (see below), whose sum is σ = 2029783680. Its totient is φ = 760767552.

The previous prime is 1331694349. The next prime is 1331694367. The reversal of 1331694357 is 7534961331.

It is a happy number.

It is not a de Polignac number, because 1331694357 - 2³ = 1331694349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331694317) 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, 116619 + ... + 127527.

It is an arithmetic number, because the mean of its divisors is an integer number (126861480).

Almost surely, 2^1331694357 is an apocalyptic number.

It is an amenable number.

1331694357 is a deficient number, since it is larger than the sum of its proper divisors (698089323).

1331694357 is a wasteful number, since it uses less digits than its factorization.

1331694357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16732.

The product of its digits is 204120, while the sum is 42.

The square root of 1331694357 is about 36492.3876582500. The cubic root of 1331694357 is about 1100.1912496669.

The spelling of 1331694357 in words is "one billion, three hundred thirty-one million, six hundred ninety-four thousand, three hundred fifty-seven".