42744017969 has 2 divisors, whose sum is σ = 42744017970. Its totient is φ = 42744017968.

The previous prime is 42744017951. The next prime is 42744017971. The reversal of 42744017969 is 96971044724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37672869025 + 5071148944 = 194095^2 + 71212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42744017969 is a prime.

It is a super-2 number, since 2×42744017969² (a number of 22 digits) contains 22 as substring.

Together with 42744017971, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42744017969.

It is not a weakly prime, because it can be changed into another prime (42744017909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21372008984 + 21372008985.

It is an arithmetic number, because the mean of its divisors is an integer number (21372008985).

Almost surely, 2^42744017969 is an apocalyptic number.

It is an amenable number.

42744017969 is a deficient number, since it is larger than the sum of its proper divisors (1).

42744017969 is an equidigital number, since it uses as much as digits as its factorization.

42744017969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 42744017969 in words is "forty-two billion, seven hundred forty-four million, seventeen thousand, nine hundred sixty-nine".