1364347921 has 2 divisors, whose sum is σ = 1364347922. Its totient is φ = 1364347920.

The previous prime is 1364347909. The next prime is 1364347961. The reversal of 1364347921 is 1297434631.

It is the 15080-th star number.

It is an a-pointer prime, because the next prime (1364347961) can be obtained adding 1364347921 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1048788225 + 315559696 = 32385^2 + 17764^2 .

It is an emirp because it is prime and its reverse (1297434631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1364347921 - 2⁹ = 1364347409 is a prime.

It is a super-2 number, since 2×1364347921² = 3722890499074044482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1364347961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682173960 + 682173961.

It is an arithmetic number, because the mean of its divisors is an integer number (682173961).

Almost surely, 2^1364347921 is an apocalyptic number.

It is an amenable number.

1364347921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1364347921 is an equidigital number, since it uses as much as digits as its factorization.

1364347921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 1364347921 is about 36937.0805695307. The cubic root of 1364347921 is about 1109.1110814641. Note that the first 3 decimals are identical.

The spelling of 1364347921 in words is "one billion, three hundred sixty-four million, three hundred forty-seven thousand, nine hundred twenty-one".