51989923 has 8 divisors (see below), whose sum is σ = 52890128. Its totient is φ = 51093504.

The previous prime is 51989869. The next prime is 51989933. The reversal of 51989923 is 32998915.

51989923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51989923 - 2⁹ = 51989411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51989933) 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 7 ways as a sum of consecutive naturals, for example, 44515 + ... + 45667.

It is an arithmetic number, because the mean of its divisors is an integer number (6611266).

Almost surely, 2^51989923 is an apocalyptic number.

51989923 is a deficient number, since it is larger than the sum of its proper divisors (900205).

51989923 is a wasteful number, since it uses less digits than its factorization.

51989923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893.

The product of its digits is 174960, while the sum is 46.

The square root of 51989923 is about 7210.4038028393. The cubic root of 51989923 is about 373.2270035376.

The spelling of 51989923 in words is "fifty-one million, nine hundred eighty-nine thousand, nine hundred twenty-three".