201901597 has 4 divisors (see below), whose sum is σ = 202096960. Its totient is φ = 201706236.

The previous prime is 201901559. The next prime is 201901607. The reversal of 201901597 is 795109102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 795109102 = 2 ⋅397554551.

It is a cyclic number.

It is not a de Polignac number, because 201901597 - 2¹¹ = 201899549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201901547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96123 + ... + 98200.

It is an arithmetic number, because the mean of its divisors is an integer number (50524240).

Almost surely, 2^201901597 is an apocalyptic number.

It is an amenable number.

201901597 is a deficient number, since it is larger than the sum of its proper divisors (195363).

201901597 is a wasteful number, since it uses less digits than its factorization.

201901597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195362.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 201901597 is about 14209.2081763904. The cubic root of 201901597 is about 586.6511387864.

The spelling of 201901597 in words is "two hundred one million, nine hundred one thousand, five hundred ninety-seven".