201940291 has 8 divisors (see below), whose sum is σ = 230889824. Its totient is φ = 173016000.

The previous prime is 201940279. The next prime is 201940301. The reversal of 201940291 is 192049102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201940291 - 2⁷ = 201940163 is a prime.

It is a super-2 number, since 2×201940291² = 81559762258329362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201940201) 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, 16201 + ... + 25813.

It is an arithmetic number, because the mean of its divisors is an integer number (28861228).

Almost surely, 2^201940291 is an apocalyptic number.

201940291 is a deficient number, since it is larger than the sum of its proper divisors (28949533).

201940291 is an equidigital number, since it uses as much as digits as its factorization.

201940291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12621.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 201940291 is about 14210.5696930137. The cubic root of 201940291 is about 586.6886131956.

Adding to 201940291 its reverse (192049102), we get a palindrome (393989393).

The spelling of 201940291 in words is "two hundred one million, nine hundred forty thousand, two hundred ninety-one".