51993437 has 2 divisors, whose sum is σ = 51993438. Its totient is φ = 51993436.

The previous prime is 51993397. The next prime is 51993449. The reversal of 51993437 is 73439915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39112516 + 12880921 = 6254^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 51993437 - 2⁸ = 51993181 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51993394 and 51993403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51993457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25996718 + 25996719.

It is an arithmetic number, because the mean of its divisors is an integer number (25996719).

Almost surely, 2^51993437 is an apocalyptic number.

It is an amenable number.

51993437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51993437 is an equidigital number, since it uses as much as digits as its factorization.

51993437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 41.

The square root of 51993437 is about 7210.6474743951. The cubic root of 51993437 is about 373.2354121552.

The spelling of 51993437 in words is "fifty-one million, nine hundred ninety-three thousand, four hundred thirty-seven".