1091413 has 2 divisors, whose sum is σ = 1091414. Its totient is φ = 1091412.

The previous prime is 1091411. The next prime is 1091443. The reversal of 1091413 is 3141901.

It is a happy number.

It is the 427-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877969 + 213444 = 937^2 + 462^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091413 - 2¹ = 1091411 is a prime.

Together with 1091411, it forms a pair of twin primes.

1091413 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545706 + 545707.

It is an arithmetic number, because the mean of its divisors is an integer number (545707).

2^1091413 is an apocalyptic number.

It is an amenable number.

1091413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091413 is an equidigital number, since it uses as much as digits as its factorization.

1091413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1091413 is about 1044.7071359955. The cubic root of 1091413 is about 102.9586977395.

The spelling of 1091413 in words is "one million, ninety-one thousand, four hundred thirteen".