331386747 has 8 divisors (see below), whose sum is σ = 442027344. Its totient is φ = 220835328.

The previous prime is 331386743. The next prime is 331386779. The reversal of 331386747 is 747683133.

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

It is not a de Polignac number, because 331386747 - 2² = 331386743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331386699 and 331386708.

It is not an unprimeable number, because it can be changed into a prime (331386743) 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, 13078 + ... + 28875.

It is an arithmetic number, because the mean of its divisors is an integer number (55253418).

Almost surely, 2^331386747 is an apocalyptic number.

331386747 is a deficient number, since it is larger than the sum of its proper divisors (110640597).

331386747 is a wasteful number, since it uses less digits than its factorization.

331386747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44589.

The product of its digits is 254016, while the sum is 42.

The square root of 331386747 is about 18204.0310645747. The cubic root of 331386747 is about 692.0089509295.

The spelling of 331386747 in words is "three hundred thirty-one million, three hundred eighty-six thousand, seven hundred forty-seven".