202438981 has 4 divisors (see below), whose sum is σ = 204404512. Its totient is φ = 200473452.

The previous prime is 202438961. The next prime is 202438987. The reversal of 202438981 is 189834202.

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.

It is a cyclic number.

It is not a de Polignac number, because 202438981 - 2¹¹ = 202436933 is a prime.

It is a super-2 number, since 2×202438981² = 81963082056636722, which contains 22 as substring.

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 202438981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202438987) 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, 982611 + ... + 982816.

It is an arithmetic number, because the mean of its divisors is an integer number (51101128).

Almost surely, 2^202438981 is an apocalyptic number.

It is an amenable number.

202438981 is a deficient number, since it is larger than the sum of its proper divisors (1965531).

202438981 is a wasteful number, since it uses less digits than its factorization.

202438981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965530.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 202438981 is about 14228.1053201050. The cubic root of 202438981 is about 587.1711572108.

The spelling of 202438981 in words is "two hundred two million, four hundred thirty-eight thousand, nine hundred eighty-one".