500054981 has 4 divisors (see below), whose sum is σ = 500176812. Its totient is φ = 499933152.

The previous prime is 500054953. The next prime is 500054987. The reversal of 500054981 is 189450005.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189450005 = 5 ⋅37890001.

It can be written as a sum of positive squares in 2 ways, for example, as 279057025 + 220997956 = 16705^2 + 14866^2 .

It is a cyclic number.

It is not a de Polignac number, because 500054981 - 2²⁶ = 432946117 is a prime.

It is a super-2 number, since 2×500054981² = 500109968045820722, 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 (500054987) 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, 54536 + ... + 63041.

It is an arithmetic number, because the mean of its divisors is an integer number (125044203).

Almost surely, 2^500054981 is an apocalyptic number.

It is an amenable number.

500054981 is a deficient number, since it is larger than the sum of its proper divisors (121831).

500054981 is a wasteful number, since it uses less digits than its factorization.

500054981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121830.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 500054981 is about 22361.9091537373. The cubic root of 500054981 is about 793.7296172169.

The spelling of 500054981 in words is "five hundred million, fifty-four thousand, nine hundred eighty-one".