28973174076449 has 2 divisors, whose sum is σ = 28973174076450. Its totient is φ = 28973174076448.

The previous prime is 28973174076443. The next prime is 28973174076503. The reversal of 28973174076449 is 94467047137982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15927027393424 + 13046146683025 = 3990868^2 + 3611945^2 .

It is a cyclic number.

It is not a de Polignac number, because 28973174076449 - 2⁴ = 28973174076433 is a prime.

It is not a weakly prime, because it can be changed into another prime (28973174076443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14486587038224 + 14486587038225.

It is an arithmetic number, because the mean of its divisors is an integer number (14486587038225).

Almost surely, 2^{28973174076449} is an apocalyptic number.

It is an amenable number.

28973174076449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28973174076449 is an equidigital number, since it uses as much as digits as its factorization.

28973174076449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512096256, while the sum is 71.

The spelling of 28973174076449 in words is "twenty-eight trillion, nine hundred seventy-three billion, one hundred seventy-four million, seventy-six thousand, four hundred forty-nine".