1331326487 has 2 divisors, whose sum is σ = 1331326488. Its totient is φ = 1331326486.

The previous prime is 1331326471. The next prime is 1331326499. The reversal of 1331326487 is 7846231331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331326487 - 2⁴ = 1331326471 is a prime.

It is a super-2 number, since 2×1331326487² = 3544860429975522338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331326487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331326417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665663243 + 665663244.

It is an arithmetic number, because the mean of its divisors is an integer number (665663244).

Almost surely, 2^1331326487 is an apocalyptic number.

1331326487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331326487 is an equidigital number, since it uses as much as digits as its factorization.

1331326487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 1331326487 is about 36487.3469438379. The cubic root of 1331326487 is about 1100.0899339693.

The spelling of 1331326487 in words is "one billion, three hundred thirty-one million, three hundred twenty-six thousand, four hundred eighty-seven".