42389091 has 12 divisors (see below), whose sum is σ = 62143432. Its totient is φ = 27837216.

The previous prime is 42389089. The next prime is 42389093. The reversal of 42389091 is 19098324.

42389091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42389089) and next prime (42389093).

It is not a de Polignac number, because 42389091 - 2¹ = 42389089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42389093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34546 + ... + 35751.

Almost surely, 2^42389091 is an apocalyptic number.

42389091 is a deficient number, since it is larger than the sum of its proper divisors (19754341).

42389091 is a wasteful number, since it uses less digits than its factorization.

42389091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70370 (or 70367 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 42389091 is about 6510.6905163738. The cubic root of 42389091 is about 348.6727720468.

The spelling of 42389091 in words is "forty-two million, three hundred eighty-nine thousand, ninety-one".