501520647 has 4 divisors (see below), whose sum is σ = 668694200. Its totient is φ = 334347096.

The previous prime is 501520639. The next prime is 501520673. The reversal of 501520647 is 746025105.

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

It is not a de Polignac number, because 501520647 - 2³ = 501520639 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 (501520627) 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, 83586772 + ... + 83586777.

It is an arithmetic number, because the mean of its divisors is an integer number (167173550).

Almost surely, 2^501520647 is an apocalyptic number.

501520647 is a deficient number, since it is larger than the sum of its proper divisors (167173553).

501520647 is a wasteful number, since it uses less digits than its factorization.

501520647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167173552.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 501520647 is about 22394.6566618022. The cubic root of 501520647 is about 794.5043372077.

The spelling of 501520647 in words is "five hundred one million, five hundred twenty thousand, six hundred forty-seven".