501977089 has 4 divisors (see below), whose sum is σ = 502065220. Its totient is φ = 501888960.

The previous prime is 501977051. The next prime is 501977107. The reversal of 501977089 is 980779105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980779105 = 5 ⋅196155821.

It can be written as a sum of positive squares in 2 ways, for example, as 288320400 + 213656689 = 16980^2 + 14617^2 .

It is a cyclic number.

It is not a de Polignac number, because 501977089 - 2⁷ = 501976961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501977689) 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 in 3 ways as a sum of consecutive naturals, for example, 34884 + ... + 47125.

It is an arithmetic number, because the mean of its divisors is an integer number (125516305).

Almost surely, 2^501977089 is an apocalyptic number.

It is an amenable number.

501977089 is a deficient number, since it is larger than the sum of its proper divisors (88131).

501977089 is an equidigital number, since it uses as much as digits as its factorization.

501977089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88130.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 501977089 is about 22404.8452125874. The cubic root of 501977089 is about 794.7452945110.

The spelling of 501977089 in words is "five hundred one million, nine hundred seventy-seven thousand, eighty-nine".