51394739 has 16 divisors (see below), whose sum is σ = 57964896. Its totient is φ = 45158400.

The previous prime is 51394729. The next prime is 51394801. The reversal of 51394739 is 93749315.

It is a cyclic number.

It is not a de Polignac number, because 51394739 - 2²⁴ = 34617523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51394696 and 51394705.

It is not an unprimeable number, because it can be changed into a prime (51394729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79859 + ... + 80499.

It is an arithmetic number, because the mean of its divisors is an integer number (3622806).

Almost surely, 2^51394739 is an apocalyptic number.

51394739 is a deficient number, since it is larger than the sum of its proper divisors (6570157).

51394739 is a wasteful number, since it uses less digits than its factorization.

51394739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886.

The product of its digits is 102060, while the sum is 41.

The square root of 51394739 is about 7169.0124145520. The cubic root of 51394739 is about 371.7972914765.

The spelling of 51394739 in words is "fifty-one million, three hundred ninety-four thousand, seven hundred thirty-nine".