42190669 has 2 divisors, whose sum is σ = 42190670. Its totient is φ = 42190668.

The previous prime is 42190667. The next prime is 42190699. The reversal of 42190669 is 96609124.

42190669 = T₅₃₀₂ + T₅₃₀₃ + T₅₃₀₄.

42190669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37675044 + 4515625 = 6138^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 42190669 - 2¹ = 42190667 is a prime.

It is a super-2 number, since 2×42190669² = 3560105101335122, which contains 22 as substring.

Together with 42190667, 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 (42190663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21095334 + 21095335.

It is an arithmetic number, because the mean of its divisors is an integer number (21095335).

Almost surely, 2^42190669 is an apocalyptic number.

42190669 is the 5304-th centered triangular number.

It is an amenable number.

42190669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42190669 is an equidigital number, since it uses as much as digits as its factorization.

42190669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 42190669 is about 6495.4344735360. The cubic root of 42190669 is about 348.1278788627.

The spelling of 42190669 in words is "forty-two million, one hundred ninety thousand, six hundred sixty-nine".