201974923 has 4 divisors (see below), whose sum is σ = 203428120. Its totient is φ = 200521728.

The previous prime is 201974887. The next prime is 201974947. The reversal of 201974923 is 329479102.

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 201974923 - 2⁹ = 201974411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201974963) 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, 726390 + ... + 726667.

It is an arithmetic number, because the mean of its divisors is an integer number (50857030).

Almost surely, 2^201974923 is an apocalyptic number.

201974923 is a deficient number, since it is larger than the sum of its proper divisors (1453197).

201974923 is a wasteful number, since it uses less digits than its factorization.

201974923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453196.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 201974923 is about 14211.7881703887. The cubic root of 201974923 is about 586.7221495750.

The spelling of 201974923 in words is "two hundred one million, nine hundred seventy-four thousand, nine hundred twenty-three".