73977223973 has 2 divisors, whose sum is σ = 73977223974. Its totient is φ = 73977223972.

The previous prime is 73977223967. The next prime is 73977224053. The reversal of 73977223973 is 37932277937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66872925604 + 7104298369 = 258598^2 + 84287^2 .

It is a cyclic number.

It is not a de Polignac number, because 73977223973 - 2⁸ = 73977223717 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 (73977223933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36988611986 + 36988611987.

It is an arithmetic number, because the mean of its divisors is an integer number (36988611987).

Almost surely, 2^73977223973 is an apocalyptic number.

It is an amenable number.

73977223973 is a deficient number, since it is larger than the sum of its proper divisors (1).

73977223973 is an equidigital number, since it uses as much as digits as its factorization.

73977223973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21003948, while the sum is 59.

The spelling of 73977223973 in words is "seventy-three billion, nine hundred seventy-seven million, two hundred twenty-three thousand, nine hundred seventy-three".