51492739 has 2 divisors, whose sum is σ = 51492740. Its totient is φ = 51492738.

The previous prime is 51492737. The next prime is 51492757. The reversal of 51492739 is 93729415.

51492739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51492739 - 2¹ = 51492737 is a prime.

Together with 51492737, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51492731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25746369 + 25746370.

It is an arithmetic number, because the mean of its divisors is an integer number (25746370).

Almost surely, 2^51492739 is an apocalyptic number.

51492739 is a deficient number, since it is larger than the sum of its proper divisors (1).

51492739 is an equidigital number, since it uses as much as digits as its factorization.

51492739 is an odious number, because the sum of its binary digits is odd.

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

The square root of 51492739 is about 7175.8441315291. The cubic root of 51492739 is about 372.0334570248.

The spelling of 51492739 in words is "fifty-one million, four hundred ninety-two thousand, seven hundred thirty-nine".