202401997 has 12 divisors (see below), whose sum is σ = 235682460. Its totient is φ = 173314176.

The previous prime is 202401971. The next prime is 202402009. The reversal of 202401997 is 799104202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 129709321 + 72692676 = 11389^2 + 8526^2 .

It is not a de Polignac number, because 202401997 - 2²⁷ = 68184269 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 (202401497) 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 11 ways as a sum of consecutive naturals, for example, 82533 + ... + 84949.

It is an arithmetic number, because the mean of its divisors is an integer number (19640205).

Almost surely, 2^202401997 is an apocalyptic number.

It is an amenable number.

202401997 is a deficient number, since it is larger than the sum of its proper divisors (33280463).

202401997 is a wasteful number, since it uses less digits than its factorization.

202401997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140 (or 4133 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 202401997 is about 14226.8055796092. The cubic root of 202401997 is about 587.1353978582.

The spelling of 202401997 in words is "two hundred two million, four hundred one thousand, nine hundred ninety-seven".