538969831 has 4 divisors (see below), whose sum is σ = 547805464. Its totient is φ = 530134200.

The previous prime is 538969759. The next prime is 538969883. The reversal of 538969831 is 138969835.

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

It is a cyclic number.

It is not a de Polignac number, because 538969831 - 2¹⁹ = 538445543 is a prime.

It is a super-2 number, since 2×538969831² = 580976957456337122, 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 (538969631) 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, 4417725 + ... + 4417846.

It is an arithmetic number, because the mean of its divisors is an integer number (136951366).

Almost surely, 2^538969831 is an apocalyptic number.

538969831 is a deficient number, since it is larger than the sum of its proper divisors (8835633).

538969831 is an equidigital number, since it uses as much as digits as its factorization.

538969831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8835632.

The product of its digits is 1399680, while the sum is 52.

The square root of 538969831 is about 23215.7237879847. The cubic root of 538969831 is about 813.8071203562.

The spelling of 538969831 in words is "five hundred thirty-eight million, nine hundred sixty-nine thousand, eight hundred thirty-one".