42959669 has 2 divisors, whose sum is σ = 42959670. Its totient is φ = 42959668.

The previous prime is 42959621. The next prime is 42959689. The reversal of 42959669 is 96695924.

42959669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34374769 + 8584900 = 5863^2 + 2930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42959669 is a prime.

It is a super-2 number, since 2×42959669² = 3691066321179122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42959689) 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, 21479834 + 21479835.

It is an arithmetic number, because the mean of its divisors is an integer number (21479835).

Almost surely, 2^42959669 is an apocalyptic number.

It is an amenable number.

42959669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42959669 is an equidigital number, since it uses as much as digits as its factorization.

42959669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 50.

The square root of 42959669 is about 6554.3625929605. The cubic root of 42959669 is about 350.2302403446.

It can be divided in two parts, 42959 and 669, that multiplied together give a triangular number (28739571 = T₇₅₈₁).

The spelling of 42959669 in words is "forty-two million, nine hundred fifty-nine thousand, six hundred sixty-nine".