513945407 has 2 divisors, whose sum is σ = 513945408. Its totient is φ = 513945406.

The previous prime is 513945403. The next prime is 513945413. The reversal of 513945407 is 704549315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513945407 - 2² = 513945403 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513945403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256972703 + 256972704.

It is an arithmetic number, because the mean of its divisors is an integer number (256972704).

Almost surely, 2^513945407 is an apocalyptic number.

513945407 is a deficient number, since it is larger than the sum of its proper divisors (1).

513945407 is an equidigital number, since it uses as much as digits as its factorization.

513945407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 513945407 is about 22670.3640685367. The cubic root of 513945407 is about 801.0119522137.

The spelling of 513945407 in words is "five hundred thirteen million, nine hundred forty-five thousand, four hundred seven".