42820937 has 2 divisors, whose sum is σ = 42820938. Its totient is φ = 42820936.

The previous prime is 42820903. The next prime is 42820969. The reversal of 42820937 is 73902824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30261001 + 12559936 = 5501^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 42820937 - 2¹⁰ = 42819913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42820897 and 42820906.

It is not a weakly prime, because it can be changed into another prime (42820537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21410468 + 21410469.

It is an arithmetic number, because the mean of its divisors is an integer number (21410469).

Almost surely, 2^42820937 is an apocalyptic number.

It is an amenable number.

42820937 is a deficient number, since it is larger than the sum of its proper divisors (1).

42820937 is an equidigital number, since it uses as much as digits as its factorization.

42820937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 42820937 is about 6543.7708547901. The cubic root of 42820937 is about 349.8528279200.

The spelling of 42820937 in words is "forty-two million, eight hundred twenty thousand, nine hundred thirty-seven".