51693437 has 2 divisors, whose sum is σ = 51693438. Its totient is φ = 51693436.

The previous prime is 51693431. The next prime is 51693449. The reversal of 51693437 is 73439615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49716601 + 1976836 = 7051^2 + 1406^2 .

It is a cyclic number.

It is not a de Polignac number, because 51693437 - 2¹⁴ = 51677053 is a prime.

It is a super-2 number, since 2×51693437² = 5344422857745938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51693437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51693431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25846718 + 25846719.

It is an arithmetic number, because the mean of its divisors is an integer number (25846719).

Almost surely, 2^51693437 is an apocalyptic number.

It is an amenable number.

51693437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51693437 is an equidigital number, since it uses as much as digits as its factorization.

51693437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 51693437 is about 7189.8148098543. The cubic root of 51693437 is about 372.5161760463.

The spelling of 51693437 in words is "fifty-one million, six hundred ninety-three thousand, four hundred thirty-seven".