200742397 has 4 divisors (see below), whose sum is σ = 203283520. Its totient is φ = 198201276.

The previous prime is 200742317. The next prime is 200742403. The reversal of 200742397 is 793247002.

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: 793247002 = 2 ⋅396623501.

It is a cyclic number.

It is not a de Polignac number, because 200742397 - 2²³ = 192353789 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 (200742317) 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, 1270443 + ... + 1270600.

It is an arithmetic number, because the mean of its divisors is an integer number (50820880).

Almost surely, 2^200742397 is an apocalyptic number.

It is an amenable number.

200742397 is a deficient number, since it is larger than the sum of its proper divisors (2541123).

200742397 is an equidigital number, since it uses as much as digits as its factorization.

200742397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541122.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 200742397 is about 14168.3590087208. The cubic root of 200742397 is about 585.5262481599.

Adding to 200742397 its reverse (793247002), we get a palindrome (993989399).

The spelling of 200742397 in words is "two hundred million, seven hundred forty-two thousand, three hundred ninety-seven".