51380737 has 2 divisors, whose sum is σ = 51380738. Its totient is φ = 51380736.

The previous prime is 51380717. The next prime is 51380789. The reversal of 51380737 is 73708315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48944016 + 2436721 = 6996^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 51380737 - 2¹¹ = 51378689 is a prime.

It is equal to p_3078925 and since 51380737 and 3078925 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51380717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690368 + 25690369.

It is an arithmetic number, because the mean of its divisors is an integer number (25690369).

Almost surely, 2^51380737 is an apocalyptic number.

It is an amenable number.

51380737 is a deficient number, since it is larger than the sum of its proper divisors (1).

51380737 is an equidigital number, since it uses as much as digits as its factorization.

51380737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 51380737 is about 7168.0357839509. The cubic root of 51380737 is about 371.7635242167.

The spelling of 51380737 in words is "fifty-one million, three hundred eighty thousand, seven hundred thirty-seven".