73981927493 has 2 divisors, whose sum is σ = 73981927494. Its totient is φ = 73981927492.

The previous prime is 73981927477. The next prime is 73981927507. The reversal of 73981927493 is 39472918937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59898646564 + 14083280929 = 244742^2 + 118673^2 .

It is a cyclic number.

It is not a de Polignac number, because 73981927493 - 2⁴ = 73981927477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73981927433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36990963746 + 36990963747.

It is an arithmetic number, because the mean of its divisors is an integer number (36990963747).

Almost surely, 2^73981927493 is an apocalyptic number.

It is an amenable number.

73981927493 is a deficient number, since it is larger than the sum of its proper divisors (1).

73981927493 is an equidigital number, since it uses as much as digits as its factorization.

73981927493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 62.

The spelling of 73981927493 in words is "seventy-three billion, nine hundred eighty-one million, nine hundred twenty-seven thousand, four hundred ninety-three".