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13320389 is a prime number
BaseRepresentation
bin110010110100…
…000011000101
3221001202010202
4302310003011
511402223024
61153300245
7221135645
oct62640305
927052122
1013320389
117578895
124564685
1329b4cb4
141aaa525
151281bae
hexcb40c5

13320389 has 2 divisors, whose sum is σ = 13320390. Its totient is φ = 13320388.

The previous prime is 13320361. The next prime is 13320397. The reversal of 13320389 is 98302331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9150625 + 4169764 = 3025^2 + 2042^2 .

It is an emirp because it is prime and its reverse (98302331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13320389 - 216 = 13254853 is a prime.

It is a super-2 number, since 2×133203892 = 354865526222642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13320589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660194 + 6660195.

It is an arithmetic number, because the mean of its divisors is an integer number (6660195).

Almost surely, 213320389 is an apocalyptic number.

It is an amenable number.

13320389 is a deficient number, since it is larger than the sum of its proper divisors (1).

13320389 is an equidigital number, since it uses as much as digits as its factorization.

13320389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 13320389 is about 3649.7108104616. The cubic root of 13320389 is about 237.0494594326.

The spelling of 13320389 in words is "thirteen million, three hundred twenty thousand, three hundred eighty-nine".