73977223849 has 2 divisors, whose sum is σ = 73977223850. Its totient is φ = 73977223848.

The previous prime is 73977223841. The next prime is 73977223867. The reversal of 73977223849 is 94832277937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70397355625 + 3579868224 = 265325^2 + 59832^2 .

It is a cyclic number.

It is not a de Polignac number, because 73977223849 - 2³ = 73977223841 is a prime.

It is not a weakly prime, because it can be changed into another prime (73977223841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36988611924 + 36988611925.

It is an arithmetic number, because the mean of its divisors is an integer number (36988611925).

Almost surely, 2^73977223849 is an apocalyptic number.

It is an amenable number.

73977223849 is a deficient number, since it is larger than the sum of its proper divisors (1).

73977223849 is an equidigital number, since it uses as much as digits as its factorization.

73977223849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32006016, while the sum is 61.

The spelling of 73977223849 in words is "seventy-three billion, nine hundred seventy-seven million, two hundred twenty-three thousand, eight hundred forty-nine".