42093009 has 36 divisors (see below), whose sum is σ = 73032960. Its totient is φ = 23269680.

The previous prime is 42092993. The next prime is 42093011. The reversal of 42093009 is 90039024.

It is not a de Polignac number, because 42093009 - 2⁴ = 42092993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42093089) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12132 + ... + 15210.

Almost surely, 2^42093009 is an apocalyptic number.

42093009 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

42093009 is a deficient number, since it is larger than the sum of its proper divisors (30939951).

42093009 is a wasteful number, since it uses less digits than its factorization.

42093009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130 (or 3120 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 42093009 is about 6487.9125302365. The cubic root of 42093009 is about 347.8590640163.

The spelling of 42093009 in words is "forty-two million, ninety-three thousand, nine".