61249431293 has 2 divisors, whose sum is σ = 61249431294. Its totient is φ = 61249431292.

The previous prime is 61249431281. The next prime is 61249431307. The reversal of 61249431293 is 39213494216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54558682084 + 6690749209 = 233578^2 + 81797^2 .

It is a cyclic number.

It is not a de Polignac number, because 61249431293 - 2⁸ = 61249431037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61249431203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30624715646 + 30624715647.

It is an arithmetic number, because the mean of its divisors is an integer number (30624715647).

Almost surely, 2^61249431293 is an apocalyptic number.

It is an amenable number.

61249431293 is a deficient number, since it is larger than the sum of its proper divisors (1).

61249431293 is an equidigital number, since it uses as much as digits as its factorization.

61249431293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 44.

The spelling of 61249431293 in words is "sixty-one billion, two hundred forty-nine million, four hundred thirty-one thousand, two hundred ninety-three".