51693797 has 2 divisors, whose sum is σ = 51693798. Its totient is φ = 51693796.

The previous prime is 51693791. The next prime is 51693809. The reversal of 51693797 is 79739615.

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., 49758916 + 1934881 = 7054^2 + 1391^2 .

It is a cyclic number.

It is not a de Polignac number, because 51693797 - 2⁸ = 51693541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51693791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25846898 + 25846899.

It is an arithmetic number, because the mean of its divisors is an integer number (25846899).

Almost surely, 2^51693797 is an apocalyptic number.

It is an amenable number.

51693797 is a deficient number, since it is larger than the sum of its proper divisors (1).

51693797 is an equidigital number, since it uses as much as digits as its factorization.

51693797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 47.

The square root of 51693797 is about 7189.8398452260. The cubic root of 51693797 is about 372.5170407951.

The spelling of 51693797 in words is "fifty-one million, six hundred ninety-three thousand, seven hundred ninety-seven".