201949087 has 4 divisors (see below), whose sum is σ = 203304600. Its totient is φ = 200593576.

The previous prime is 201949079. The next prime is 201949091. The reversal of 201949087 is 780949102.

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 201949087 - 2³ = 201949079 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201949037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677533 + ... + 677830.

It is an arithmetic number, because the mean of its divisors is an integer number (50826150).

Almost surely, 2^201949087 is an apocalyptic number.

201949087 is a deficient number, since it is larger than the sum of its proper divisors (1355513).

201949087 is a wasteful number, since it uses less digits than its factorization.

201949087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355512.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 201949087 is about 14210.8791775879. The cubic root of 201949087 is about 586.6971312879.

The spelling of 201949087 in words is "two hundred one million, nine hundred forty-nine thousand, eighty-seven".