1331963207 has 4 divisors (see below), whose sum is σ = 1332036840. Its totient is φ = 1331889576.

The previous prime is 1331963203. The next prime is 1331963219. The reversal of 1331963207 is 7023691331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7023691331 = 4421 ⋅1588711.

It is a cyclic number.

It is not a de Polignac number, because 1331963207 - 2² = 1331963203 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 (1331963203) 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, 11144 + ... + 52802.

It is an arithmetic number, because the mean of its divisors is an integer number (333009210).

Almost surely, 2^1331963207 is an apocalyptic number.

1331963207 is a deficient number, since it is larger than the sum of its proper divisors (73633).

1331963207 is an equidigital number, since it uses as much as digits as its factorization.

1331963207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73632.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 1331963207 is about 36496.0711173134. The cubic root of 1331963207 is about 1100.2652822989.

The spelling of 1331963207 in words is "one billion, three hundred thirty-one million, nine hundred sixty-three thousand, two hundred seven".