51234349493 has 2 divisors, whose sum is σ = 51234349494. Its totient is φ = 51234349492.

The previous prime is 51234349489. The next prime is 51234349541. The reversal of 51234349493 is 39494343215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30865921969 + 20368427524 = 175687^2 + 142718^2 .

It is a cyclic number.

It is not a de Polignac number, because 51234349493 - 2² = 51234349489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51234349423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617174746 + 25617174747.

It is an arithmetic number, because the mean of its divisors is an integer number (25617174747).

Almost surely, 2^51234349493 is an apocalyptic number.

It is an amenable number.

51234349493 is a deficient number, since it is larger than the sum of its proper divisors (1).

51234349493 is an equidigital number, since it uses as much as digits as its factorization.

51234349493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 47.

The spelling of 51234349493 in words is "fifty-one billion, two hundred thirty-four million, three hundred forty-nine thousand, four hundred ninety-three".