51739057 has 4 divisors (see below), whose sum is σ = 52839936. Its totient is φ = 50638180.

The previous prime is 51739043. The next prime is 51739069. The reversal of 51739057 is 75093715.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75093715 = 5 ⋅15018743.

It is a cyclic number.

It is not a de Polignac number, because 51739057 - 2¹⁹ = 51214769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51739027) 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, 550369 + ... + 550462.

It is an arithmetic number, because the mean of its divisors is an integer number (13209984).

Almost surely, 2^51739057 is an apocalyptic number.

It is an amenable number.

51739057 is a deficient number, since it is larger than the sum of its proper divisors (1100879).

51739057 is a wasteful number, since it uses less digits than its factorization.

51739057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100878.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 51739057 is about 7192.9866536787. The cubic root of 51739057 is about 372.6257269694.

The spelling of 51739057 in words is "fifty-one million, seven hundred thirty-nine thousand, fifty-seven".