42086969 has 2 divisors, whose sum is σ = 42086970. Its totient is φ = 42086968.

The previous prime is 42086959. The next prime is 42087029. The reversal of 42086969 is 96968024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41126569 + 960400 = 6413^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 42086969 - 2⁴ = 42086953 is a prime.

It is a super-2 number, since 2×42086969² = 3542625919213922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42086939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21043484 + 21043485.

It is an arithmetic number, because the mean of its divisors is an integer number (21043485).

Almost surely, 2^42086969 is an apocalyptic number.

It is an amenable number.

42086969 is a deficient number, since it is larger than the sum of its proper divisors (1).

42086969 is an equidigital number, since it uses as much as digits as its factorization.

42086969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 42086969 is about 6487.4470325391. The cubic root of 42086969 is about 347.8424249171.

The spelling of 42086969 in words is "forty-two million, eighty-six thousand, nine hundred sixty-nine".