42119309 has 2 divisors, whose sum is σ = 42119310. Its totient is φ = 42119308.

The previous prime is 42119299. The next prime is 42119327. The reversal of 42119309 is 90391124.

It is a happy number.

42119309 is nontrivially palindromic in base 5.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39413284 + 2706025 = 6278^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 42119309 - 2⁴ = 42119293 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42119369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21059654 + 21059655.

It is an arithmetic number, because the mean of its divisors is an integer number (21059655).

Almost surely, 2^42119309 is an apocalyptic number.

It is an amenable number.

42119309 is a deficient number, since it is larger than the sum of its proper divisors (1).

42119309 is an equidigital number, since it uses as much as digits as its factorization.

42119309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 42119309 is about 6489.9390598063. The cubic root of 42119309 is about 347.9314971738.

The spelling of 42119309 in words is "forty-two million, one hundred nineteen thousand, three hundred nine".