513997 has 4 divisors (see below), whose sum is σ = 560736. Its totient is φ = 467260.

The previous prime is 513991. The next prime is 514001. The reversal of 513997 is 799315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23353 + ... + 23374.

It is an arithmetic number, because the mean of its divisors is an integer number (140184).

2⁵¹³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

513997 is a deficient number, since it is larger than the sum of its proper divisors (46739).

513997 is a wasteful number, since it uses less digits than its factorization.

513997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46738.

The product of its digits is 8505, while the sum is 34.

The square root of 513997 is about 716.9358409230. The cubic root of 513997 is about 80.1038754818.

The spelling of 513997 in words is "five hundred thirteen thousand, nine hundred ninety-seven".