201438971 has 4 divisors (see below), whose sum is σ = 202095432. Its totient is φ = 200782512.

The previous prime is 201438947. The next prime is 201438997. The reversal of 201438971 is 179834102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201438971 - 2²² = 197244667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201438271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327770 + ... + 328383.

It is an arithmetic number, because the mean of its divisors is an integer number (50523858).

Almost surely, 2^201438971 is an apocalyptic number.

201438971 is a deficient number, since it is larger than the sum of its proper divisors (656461).

201438971 is an equidigital number, since it uses as much as digits as its factorization.

201438971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656460.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 201438971 is about 14192.9197489452. The cubic root of 201438971 is about 586.2027229436.

The spelling of 201438971 in words is "two hundred one million, four hundred thirty-eight thousand, nine hundred seventy-one".