520149767 has 4 divisors (see below), whose sum is σ = 521790936. Its totient is φ = 518508600.

The previous prime is 520149701. The next prime is 520149823. The reversal of 520149767 is 767941025.

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 520149767 - 2¹⁰ = 520148743 is a prime.

It is a super-2 number, since 2×520149767² = 541111560220308578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520142767) 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, 820109 + ... + 820742.

It is an arithmetic number, because the mean of its divisors is an integer number (130447734).

Almost surely, 2^520149767 is an apocalyptic number.

520149767 is a deficient number, since it is larger than the sum of its proper divisors (1641169).

520149767 is a wasteful number, since it uses less digits than its factorization.

520149767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641168.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 520149767 is about 22806.7921242774. The cubic root of 520149767 is about 804.2223458502. Note that the first 3 decimals are identical.

The spelling of 520149767 in words is "five hundred twenty million, one hundred forty-nine thousand, seven hundred sixty-seven".