513947449 has 2 divisors, whose sum is σ = 513947450. Its totient is φ = 513947448.

The previous prime is 513947437. The next prime is 513947459. The reversal of 513947449 is 944749315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385533225 + 128414224 = 19635^2 + 11332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513947449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513947399 and 513947408.

It is not a weakly prime, because it can be changed into another prime (513947459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256973724 + 256973725.

It is an arithmetic number, because the mean of its divisors is an integer number (256973725).

Almost surely, 2^513947449 is an apocalyptic number.

It is an amenable number.

513947449 is a deficient number, since it is larger than the sum of its proper divisors (1).

513947449 is an equidigital number, since it uses as much as digits as its factorization.

513947449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 513947449 is about 22670.4091052632. The cubic root of 513947449 is about 801.0130130684.

The spelling of 513947449 in words is "five hundred thirteen million, nine hundred forty-seven thousand, four hundred forty-nine".