1304440091 has 2 divisors, whose sum is σ = 1304440092. Its totient is φ = 1304440090.

The previous prime is 1304440063. The next prime is 1304440099. The reversal of 1304440091 is 1900444031.

It is a strong prime.

It is an emirp because it is prime and its reverse (1900444031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1304440091 - 2²² = 1300245787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1304440091.

It is not a weakly prime, because it can be changed into another prime (1304440099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652220045 + 652220046.

It is an arithmetic number, because the mean of its divisors is an integer number (652220046).

Almost surely, 2^1304440091 is an apocalyptic number.

1304440091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304440091 is an equidigital number, since it uses as much as digits as its factorization.

1304440091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1304440091 is about 36117.0332530234. The cubic root of 1304440091 is about 1092.6340054193.

It can be divided in two parts, 13044 and 40091, that added together give a palindrome (53135).

The spelling of 1304440091 in words is "one billion, three hundred four million, four hundred forty thousand, ninety-one".