520688354 has 4 divisors (see below), whose sum is σ = 781032534. Its totient is φ = 260344176.

The previous prime is 520688353. The next prime is 520688387. The reversal of 520688354 is 453886025.

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

It can be written as a sum of positive squares in only one way, i.e., 368832025 + 151856329 = 19205^2 + 12323^2 .

It is a super-2 number, since 2×520688354² = 542232723982458632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520688351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130172087 + ... + 130172090.

Almost surely, 2^520688354 is an apocalyptic number.

520688354 is a deficient number, since it is larger than the sum of its proper divisors (260344180).

520688354 is a wasteful number, since it uses less digits than its factorization.

520688354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260344179.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 520688354 is about 22818.5966702600. The cubic root of 520688354 is about 804.4998263728.

The spelling of 520688354 in words is "five hundred twenty million, six hundred eighty-eight thousand, three hundred fifty-four".