51612739 has 2 divisors, whose sum is σ = 51612740. Its totient is φ = 51612738.

The previous prime is 51612733. The next prime is 51612749. The reversal of 51612739 is 93721615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51612739 - 2⁷ = 51612611 is a prime.

It is not a weakly prime, because it can be changed into another prime (51612733) 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 as a sum of consecutive naturals, namely, 25806369 + 25806370.

It is an arithmetic number, because the mean of its divisors is an integer number (25806370).

Almost surely, 2^51612739 is an apocalyptic number.

51612739 is a deficient number, since it is larger than the sum of its proper divisors (1).

51612739 is an equidigital number, since it uses as much as digits as its factorization.

51612739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 51612739 is about 7184.2006514295. The cubic root of 51612739 is about 372.3222315891.

The spelling of 51612739 in words is "fifty-one million, six hundred twelve thousand, seven hundred thirty-nine".