201909043 has 8 divisors (see below), whose sum is σ = 231926112. Its totient is φ = 172185216.

The previous prime is 201909023. The next prime is 201909047. The reversal of 201909043 is 340909102.

It is a happy number.

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

It is not a de Polignac number, because 201909043 - 2¹⁷ = 201777971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201909047) 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, 71830 + ... + 74587.

It is an arithmetic number, because the mean of its divisors is an integer number (28990764).

Almost surely, 2^201909043 is an apocalyptic number.

201909043 is a deficient number, since it is larger than the sum of its proper divisors (30017069).

201909043 is a wasteful number, since it uses less digits than its factorization.

201909043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146621.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 201909043 is about 14209.4701871674. The cubic root of 201909043 is about 586.6583504689.

The spelling of 201909043 in words is "two hundred one million, nine hundred nine thousand, forty-three".