42172276693 has 2 divisors, whose sum is σ = 42172276694. Its totient is φ = 42172276692.

The previous prime is 42172276691. The next prime is 42172276711. The reversal of 42172276693 is 39667227124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31624575889 + 10547700804 = 177833^2 + 102702^2 .

It is a cyclic number.

It is not a de Polignac number, because 42172276693 - 2¹ = 42172276691 is a prime.

Together with 42172276691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42172276691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21086138346 + 21086138347.

It is an arithmetic number, because the mean of its divisors is an integer number (21086138347).

Almost surely, 2^42172276693 is an apocalyptic number.

It is an amenable number.

42172276693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42172276693 is an equidigital number, since it uses as much as digits as its factorization.

42172276693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 49.

The spelling of 42172276693 in words is "forty-two billion, one hundred seventy-two million, two hundred seventy-six thousand, six hundred ninety-three".