51790039 has 4 divisors (see below), whose sum is σ = 59188624. Its totient is φ = 44391456.

The previous prime is 51790031. The next prime is 51790049. The reversal of 51790039 is 93009715.

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 51790039 - 2³ = 51790031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51789986 and 51790013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51790031) 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, 3699282 + ... + 3699295.

It is an arithmetic number, because the mean of its divisors is an integer number (14797156).

Almost surely, 2^51790039 is an apocalyptic number.

51790039 is a deficient number, since it is larger than the sum of its proper divisors (7398585).

51790039 is an equidigital number, since it uses as much as digits as its factorization.

51790039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7398584.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 51790039 is about 7196.5296497687. The cubic root of 51790039 is about 372.7480779204.

The spelling of 51790039 in words is "fifty-one million, seven hundred ninety thousand, thirty-nine".