15641369 has 2 divisors, whose sum is σ = 15641370. Its totient is φ = 15641368.

The previous prime is 15641363. The next prime is 15641393. The reversal of 15641369 is 96314651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7912969 + 7728400 = 2813^2 + 2780^2 .

It is an emirp because it is prime and its reverse (96314651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15641369 - 2⁸ = 15641113 is a prime.

It is a super-2 number, since 2×15641369² = 489304848388322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15641363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820684 + 7820685.

It is an arithmetic number, because the mean of its divisors is an integer number (7820685).

Almost surely, 2^15641369 is an apocalyptic number.

It is an amenable number.

15641369 is a deficient number, since it is larger than the sum of its proper divisors (1).

15641369 is an equidigital number, since it uses as much as digits as its factorization.

15641369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 15641369 is about 3954.9170661343. The cubic root of 15641369 is about 250.0872708650.

The spelling of 15641369 in words is "fifteen million, six hundred forty-one thousand, three hundred sixty-nine".