42969893 has 2 divisors, whose sum is σ = 42969894. Its totient is φ = 42969892.

The previous prime is 42969881. The next prime is 42969929. The reversal of 42969893 is 39896924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42276004 + 693889 = 6502^2 + 833^2 .

It is a cyclic number.

It is not a de Polignac number, because 42969893 - 2¹⁶ = 42904357 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 (42969833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21484946 + 21484947.

It is an arithmetic number, because the mean of its divisors is an integer number (21484947).

Almost surely, 2^42969893 is an apocalyptic number.

It is an amenable number.

42969893 is a deficient number, since it is larger than the sum of its proper divisors (1).

42969893 is an equidigital number, since it uses as much as digits as its factorization.

42969893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 42969893 is about 6555.1424851028. The cubic root of 42969893 is about 350.2580219829.

The spelling of 42969893 in words is "forty-two million, nine hundred sixty-nine thousand, eight hundred ninety-three".