501900139 has 4 divisors (see below), whose sum is σ = 540507856. Its totient is φ = 463292424.

The previous prime is 501900101. The next prime is 501900247. The reversal of 501900139 is 931009105.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501900139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501900439) 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, 19303839 + ... + 19303864.

It is an arithmetic number, because the mean of its divisors is an integer number (135126964).

Almost surely, 2^501900139 is an apocalyptic number.

501900139 is a deficient number, since it is larger than the sum of its proper divisors (38607717).

501900139 is a wasteful number, since it uses less digits than its factorization.

501900139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38607716.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 501900139 is about 22403.1278842933. The cubic root of 501900139 is about 794.7046825807.

The spelling of 501900139 in words is "five hundred one million, nine hundred thousand, one hundred thirty-nine".