42537889 has 2 divisors, whose sum is σ = 42537890. Its totient is φ = 42537888.

The previous prime is 42537881. The next prime is 42537899. The reversal of 42537889 is 98873524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 14500864 = 5295^2 + 3808^2 .

It is a cyclic number.

It is not a de Polignac number, because 42537889 - 2³ = 42537881 is a prime.

It is not a weakly prime, because it can be changed into another prime (42537881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21268944 + 21268945.

It is an arithmetic number, because the mean of its divisors is an integer number (21268945).

Almost surely, 2^42537889 is an apocalyptic number.

It is an amenable number.

42537889 is a deficient number, since it is larger than the sum of its proper divisors (1).

42537889 is an equidigital number, since it uses as much as digits as its factorization.

42537889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 42537889 is about 6522.1077114687. The cubic root of 42537889 is about 349.0802764408.

The spelling of 42537889 in words is "forty-two million, five hundred thirty-seven thousand, eight hundred eighty-nine".