1330691 has 2 divisors, whose sum is σ = 1330692. Its totient is φ = 1330690.

The previous prime is 1330649. The next prime is 1330699. The reversal of 1330691 is 1960331.

It is a strong prime.

It is an emirp because it is prime and its reverse (1960331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330691 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (1330699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665345 + 665346.

It is an arithmetic number, because the mean of its divisors is an integer number (665346).

2^1330691 is an apocalyptic number.

1330691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330691 is an equidigital number, since it uses as much as digits as its factorization.

1330691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1330691 is about 1153.5558070592. Note that the first 3 decimals coincide. The cubic root of 1330691 is about 109.9914869445.

The spelling of 1330691 in words is "one million, three hundred thirty thousand, six hundred ninety-one".