51658739 has 12 divisors (see below), whose sum is σ = 59481720. Its totient is φ = 44487360.

The previous prime is 51658721. The next prime is 51658751. The reversal of 51658739 is 93785615.

It is not a de Polignac number, because 51658739 - 2¹² = 51654643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51658739.

It is not an unprimeable number, because it can be changed into a prime (51658709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2534 + ... + 10475.

It is an arithmetic number, because the mean of its divisors is an integer number (4956810).

Almost surely, 2^51658739 is an apocalyptic number.

51658739 is a deficient number, since it is larger than the sum of its proper divisors (7822981).

51658739 is a wasteful number, since it uses less digits than its factorization.

51658739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13058 (or 13039 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 51658739 is about 7187.4014080195. The cubic root of 51658739 is about 372.4328098262.

The spelling of 51658739 in words is "fifty-one million, six hundred fifty-eight thousand, seven hundred thirty-nine".