42437869 has 2 divisors, whose sum is σ = 42437870. Its totient is φ = 42437868.

The previous prime is 42437821. The next prime is 42437891. The reversal of 42437869 is 96873424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41447844 + 990025 = 6438^2 + 995^2 .

It is a cyclic number.

It is not a de Polignac number, because 42437869 - 2¹¹ = 42435821 is a prime.

It is a super-3 number, since 3×42437869³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42437809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21218934 + 21218935.

It is an arithmetic number, because the mean of its divisors is an integer number (21218935).

Almost surely, 2^42437869 is an apocalyptic number.

It is an amenable number.

42437869 is a deficient number, since it is larger than the sum of its proper divisors (1).

42437869 is an equidigital number, since it uses as much as digits as its factorization.

42437869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 42437869 is about 6514.4354321768. The cubic root of 42437869 is about 348.8064624264.

The spelling of 42437869 in words is "forty-two million, four hundred thirty-seven thousand, eight hundred sixty-nine".