513997667 has 4 divisors (see below), whose sum is σ = 514170720. Its totient is φ = 513824616.

The previous prime is 513997663. The next prime is 513997739. The reversal of 513997667 is 766799315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513997667 - 2² = 513997663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513997663) 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, 81992 + ... + 88037.

It is an arithmetic number, because the mean of its divisors is an integer number (128542680).

Almost surely, 2^513997667 is an apocalyptic number.

513997667 is a deficient number, since it is larger than the sum of its proper divisors (173053).

513997667 is a wasteful number, since it uses less digits than its factorization.

513997667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173052.

The product of its digits is 2143260, while the sum is 53.

The square root of 513997667 is about 22671.5166453416. The cubic root of 513997667 is about 801.0391013137.

The spelling of 513997667 in words is "five hundred thirteen million, nine hundred ninety-seven thousand, six hundred sixty-seven".