1331630347 has 4 divisors (see below), whose sum is σ = 1350385776. Its totient is φ = 1312874920.

The previous prime is 1331630341. The next prime is 1331630369. The reversal of 1331630347 is 7430361331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7430361331 = 19 ⋅391071649.

It is a cyclic number.

It is not a de Polignac number, because 1331630347 - 2¹⁹ = 1331106059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331630341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9377608 + ... + 9377749.

It is an arithmetic number, because the mean of its divisors is an integer number (337596444).

Almost surely, 2^1331630347 is an apocalyptic number.

1331630347 is a deficient number, since it is larger than the sum of its proper divisors (18755429).

1331630347 is an equidigital number, since it uses as much as digits as its factorization.

1331630347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18755428.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 1331630347 is about 36491.5106154843. The cubic root of 1331630347 is about 1100.1736219057.

Adding to 1331630347 its reverse (7430361331), we get a palindrome (8761991678).

The spelling of 1331630347 in words is "one billion, three hundred thirty-one million, six hundred thirty thousand, three hundred forty-seven".