201642797 has 16 divisors (see below), whose sum is σ = 219542400. Its totient is φ = 184450560.

The previous prime is 201642751. The next prime is 201642799. The reversal of 201642797 is 797246102.

It is a cyclic number.

It is not a de Polignac number, because 201642797 - 2¹⁰ = 201641773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201642797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201642799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305654 + ... + 306312.

It is an arithmetic number, because the mean of its divisors is an integer number (13721400).

Almost surely, 2^201642797 is an apocalyptic number.

It is an amenable number.

201642797 is a deficient number, since it is larger than the sum of its proper divisors (17899603).

201642797 is a wasteful number, since it uses less digits than its factorization.

201642797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 201642797 is about 14200.0984855740. The cubic root of 201642797 is about 586.4003726809.

Adding to 201642797 its reverse (797246102), we get a palindrome (998888899).

The spelling of 201642797 in words is "two hundred one million, six hundred forty-two thousand, seven hundred ninety-seven".