51947923 has 4 divisors (see below), whose sum is σ = 51965200. Its totient is φ = 51930648.

The previous prime is 51947911. The next prime is 51947939. The reversal of 51947923 is 32974915.

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 51947923 - 2⁵ = 51947891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51927923) 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, 2823 + ... + 10576.

It is an arithmetic number, because the mean of its divisors is an integer number (12991300).

Almost surely, 2^51947923 is an apocalyptic number.

51947923 is a deficient number, since it is larger than the sum of its proper divisors (17277).

51947923 is a wasteful number, since it uses less digits than its factorization.

51947923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17276.

The product of its digits is 68040, while the sum is 40.

The square root of 51947923 is about 7207.4907561509. The cubic root of 51947923 is about 373.1264727918.

The spelling of 51947923 in words is "fifty-one million, nine hundred forty-seven thousand, nine hundred twenty-three".