1331947941 has 8 divisors (see below), whose sum is σ = 1823928864. Its totient is φ = 863966160.

The previous prime is 1331947921. The next prime is 1331947957. The reversal of 1331947941 is 1497491331.

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

It is not a de Polignac number, because 1331947941 - 2¹⁵ = 1331915173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331947893 and 1331947902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331947921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5999655 + ... + 5999876.

It is an arithmetic number, because the mean of its divisors is an integer number (227991108).

Almost surely, 2^1331947941 is an apocalyptic number.

It is an amenable number.

1331947941 is a deficient number, since it is larger than the sum of its proper divisors (491980923).

1331947941 is a wasteful number, since it uses less digits than its factorization.

1331947941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11999571.

The product of its digits is 81648, while the sum is 42.

The square root of 1331947941 is about 36495.8619709139. The cubic root of 1331947941 is about 1100.2610788009.

The spelling of 1331947941 in words is "one billion, three hundred thirty-one million, nine hundred forty-seven thousand, nine hundred forty-one".