201830409 has 24 divisors (see below), whose sum is σ = 336746592. Its totient is φ = 115125120.

The previous prime is 201830399. The next prime is 201830411. The reversal of 201830409 is 904038102.

It is not a de Polignac number, because 201830409 - 2¹⁶ = 201764873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201830479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58279 + ... + 61644.

It is an arithmetic number, because the mean of its divisors is an integer number (14031108).

Almost surely, 2^201830409 is an apocalyptic number.

It is an amenable number.

201830409 is a deficient number, since it is larger than the sum of its proper divisors (134916183).

201830409 is a wasteful number, since it uses less digits than its factorization.

201830409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119957 (or 119954 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 201830409 is about 14206.7029602227. The cubic root of 201830409 is about 586.5821820418.

The spelling of 201830409 in words is "two hundred one million, eight hundred thirty thousand, four hundred nine".