51234349693 has 2 divisors, whose sum is σ = 51234349694. Its totient is φ = 51234349692.

The previous prime is 51234349651. The next prime is 51234349721. The reversal of 51234349693 is 39694343215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31421816644 + 19812533049 = 177262^2 + 140757^2 .

It is a cyclic number.

It is not a de Polignac number, because 51234349693 - 2⁹ = 51234349181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51234349493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617174846 + 25617174847.

It is an arithmetic number, because the mean of its divisors is an integer number (25617174847).

Almost surely, 2^51234349693 is an apocalyptic number.

It is an amenable number.

51234349693 is a deficient number, since it is larger than the sum of its proper divisors (1).

51234349693 is an equidigital number, since it uses as much as digits as its factorization.

51234349693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 49.

The spelling of 51234349693 in words is "fifty-one billion, two hundred thirty-four million, three hundred forty-nine thousand, six hundred ninety-three".