42837869 has 2 divisors, whose sum is σ = 42837870. Its totient is φ = 42837868.

The previous prime is 42837757. The next prime is 42837881. The reversal of 42837869 is 96873824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 11812969 = 5570^2 + 3437^2 .

It is a cyclic number.

It is not a de Polignac number, because 42837869 - 2²⁴ = 26060653 is a prime.

It is a super-2 number, since 2×42837869² = 3670166040922322, 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 (42837889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21418934 + 21418935.

It is an arithmetic number, because the mean of its divisors is an integer number (21418935).

Almost surely, 2^42837869 is an apocalyptic number.

It is an amenable number.

42837869 is a deficient number, since it is larger than the sum of its proper divisors (1).

42837869 is an equidigital number, since it uses as much as digits as its factorization.

42837869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 42837869 is about 6545.0644763822. The cubic root of 42837869 is about 349.8989340843.

The spelling of 42837869 in words is "forty-two million, eight hundred thirty-seven thousand, eight hundred sixty-nine".