513780373 has 4 divisors (see below), whose sum is σ = 514925100. Its totient is φ = 512635648.

The previous prime is 513780347. The next prime is 513780403. The reversal of 513780373 is 373087315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 373087315 = 5 ⋅74617463.

It can be written as a sum of positive squares in 2 ways, for example, as 428365809 + 85414564 = 20697^2 + 9242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513780373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513780073) 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, 571690 + ... + 572587.

It is an arithmetic number, because the mean of its divisors is an integer number (128731275).

Almost surely, 2^513780373 is an apocalyptic number.

It is an amenable number.

513780373 is a deficient number, since it is larger than the sum of its proper divisors (1144727).

513780373 is a wasteful number, since it uses less digits than its factorization.

513780373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144726.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 513780373 is about 22666.7239141434. The cubic root of 513780373 is about 800.9262048710.

The spelling of 513780373 in words is "five hundred thirteen million, seven hundred eighty thousand, three hundred seventy-three".