501057861 has 4 divisors (see below), whose sum is σ = 668077152. Its totient is φ = 334038572.

The previous prime is 501057859. The next prime is 501057883. The reversal of 501057861 is 168750105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 501057861 - 2¹ = 501057859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501057841) 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, 83509641 + ... + 83509646.

It is an arithmetic number, because the mean of its divisors is an integer number (167019288).

Almost surely, 2^501057861 is an apocalyptic number.

It is an amenable number.

501057861 is a deficient number, since it is larger than the sum of its proper divisors (167019291).

501057861 is a wasteful number, since it uses less digits than its factorization.

501057861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167019290.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 501057861 is about 22384.3217677016. The cubic root of 501057861 is about 794.2598815771.

The spelling of 501057861 in words is "five hundred one million, fifty-seven thousand, eight hundred sixty-one".