203174661001 has 9 divisors (see below), whose sum is σ = 220012043349. Its totient is φ = 187540431936.

The previous prime is 203174660921. The next prime is 203174661083. The reversal of 203174661001 is 100166471302.

The square root of 203174661001 is 450749.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 126523201401 + 76651459600 = 355701^2 + 276860^2 .

It is not a de Polignac number, because 203174661001 - 2¹³ = 203174652809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203174661401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5842401 + ... + 5877073.

Almost surely, 2^203174661001 is an apocalyptic number.

203174661001 is the 450749-th square number.

203174661001 is the 225375-th centered octagonal number.

It is an amenable number.

203174661001 is a deficient number, since it is larger than the sum of its proper divisors (16837382348).

203174661001 is an frugal number, since it uses more digits than its factorization.

203174661001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69372 (or 34686 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 203174661001 in words is "two hundred three billion, one hundred seventy-four million, six hundred sixty-one thousand, one".