42099089 has 8 divisors (see below), whose sum is σ = 45307368. Its totient is φ = 38972160.

The previous prime is 42099073. The next prime is 42099091. The reversal of 42099089 is 98099024.

It can be written as a sum of positive squares in 4 ways, for example, as 11937025 + 30162064 = 3455^2 + 5492^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42099089 - 2⁴ = 42099073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42099049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19262 + ... + 21335.

It is an arithmetic number, because the mean of its divisors is an integer number (5663421).

Almost surely, 2^42099089 is an apocalyptic number.

It is an amenable number.

42099089 is a deficient number, since it is larger than the sum of its proper divisors (3208279).

42099089 is a wasteful number, since it uses less digits than its factorization.

42099089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40675.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 42099089 is about 6488.3810769714. The cubic root of 42099089 is about 347.8758117006.

The spelling of 42099089 in words is "forty-two million, ninety-nine thousand, eighty-nine".