202001389 has 4 divisors (see below), whose sum is σ = 207460924. Its totient is φ = 196541856.

The previous prime is 202001377. The next prime is 202001411. The reversal of 202001389 is 983100202.

202001389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 195021225 + 6980164 = 13965^2 + 2642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202001389 is a prime.

It is a super-2 number, since 2×202001389² = 81609122315858642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202001329) 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, 2729712 + ... + 2729785.

It is an arithmetic number, because the mean of its divisors is an integer number (51865231).

Almost surely, 2^202001389 is an apocalyptic number.

It is an amenable number.

202001389 is a deficient number, since it is larger than the sum of its proper divisors (5459535).

202001389 is an equidigital number, since it uses as much as digits as its factorization.

202001389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5459534.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 202001389 is about 14212.7192683174. The cubic root of 202001389 is about 586.7477757105.

The spelling of 202001389 in words is "two hundred two million, one thousand, three hundred eighty-nine".