513918941 has 2 divisors, whose sum is σ = 513918942. Its totient is φ = 513918940.

The previous prime is 513918883. The next prime is 513918943. The reversal of 513918941 is 149819315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274598041 + 239320900 = 16571^2 + 15470^2 .

It is a cyclic number.

It is not a de Polignac number, because 513918941 - 2¹⁰ = 513917917 is a prime.

It is a super-2 number, since 2×513918941² = 528225355837122962, which contains 22 as substring.

Together with 513918943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513918943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256959470 + 256959471.

It is an arithmetic number, because the mean of its divisors is an integer number (256959471).

Almost surely, 2^513918941 is an apocalyptic number.

It is an amenable number.

513918941 is a deficient number, since it is larger than the sum of its proper divisors (1).

513918941 is an equidigital number, since it uses as much as digits as its factorization.

513918941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 41.

The square root of 513918941 is about 22669.7803474140. The cubic root of 513918941 is about 800.9982024094.

The spelling of 513918941 in words is "five hundred thirteen million, nine hundred eighteen thousand, nine hundred forty-one".