336521389 has 2 divisors, whose sum is σ = 336521390. Its totient is φ = 336521388.

The previous prime is 336521357. The next prime is 336521413. The reversal of 336521389 is 983125633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336098889 + 422500 = 18333^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 336521389 - 2⁵ = 336521357 is a prime.

It is a super-2 number, since 2×336521389² = 226493290508978642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (336521329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168260694 + 168260695.

It is an arithmetic number, because the mean of its divisors is an integer number (168260695).

Almost surely, 2^336521389 is an apocalyptic number.

It is an amenable number.

336521389 is a deficient number, since it is larger than the sum of its proper divisors (1).

336521389 is an equidigital number, since it uses as much as digits as its factorization.

336521389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 336521389 is about 18344.5193177690. The cubic root of 336521389 is about 695.5647387824.

The spelling of 336521389 in words is "three hundred thirty-six million, five hundred twenty-one thousand, three hundred eighty-nine".