42047123363173 has 2 divisors, whose sum is σ = 42047123363174. Its totient is φ = 42047123363172.

The previous prime is 42047123363153. The next prime is 42047123363233. The reversal of 42047123363173 is 37136332174024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41755660507044 + 291462856129 = 6461862^2 + 539873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42047123363173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42047123363153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21023561681586 + 21023561681587.

It is an arithmetic number, because the mean of its divisors is an integer number (21023561681587).

Almost surely, 2^{42047123363173} is an apocalyptic number.

It is an amenable number.

42047123363173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42047123363173 is an equidigital number, since it uses as much as digits as its factorization.

42047123363173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 46.

The spelling of 42047123363173 in words is "forty-two trillion, forty-seven billion, one hundred twenty-three million, three hundred sixty-three thousand, one hundred seventy-three".