1331712091 has 2 divisors, whose sum is σ = 1331712092. Its totient is φ = 1331712090.

The previous prime is 1331712061. The next prime is 1331712097. The reversal of 1331712091 is 1902171331.

It is a strong prime.

It is an emirp because it is prime and its reverse (1902171331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331712091 - 2⁷ = 1331711963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331712097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665856045 + 665856046.

It is an arithmetic number, because the mean of its divisors is an integer number (665856046).

Almost surely, 2^1331712091 is an apocalyptic number.

1331712091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331712091 is an equidigital number, since it uses as much as digits as its factorization.

1331712091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1331712091 is about 36492.6306396237. The cubic root of 1331712091 is about 1100.1961333463.

The spelling of 1331712091 in words is "one billion, three hundred thirty-one million, seven hundred twelve thousand, ninety-one".