202042489 has 4 divisors (see below), whose sum is σ = 220410000. Its totient is φ = 183674980.

The previous prime is 202042483. The next prime is 202042493. The reversal of 202042489 is 984240202.

202042489 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, 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 202042489 - 2¹⁹ = 201518201 is a prime.

It is a super-2 number, since 2×202042489² = 81642334722630242, 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 202042489.

It is not an unprimeable number, because it can be changed into a prime (202042483) 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, 9183739 + ... + 9183760.

It is an arithmetic number, because the mean of its divisors is an integer number (55102500).

Almost surely, 2^202042489 is an apocalyptic number.

It is an amenable number.

202042489 is a deficient number, since it is larger than the sum of its proper divisors (18367511).

202042489 is a wasteful number, since it uses less digits than its factorization.

202042489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18367510.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 202042489 is about 14214.1650827616. The cubic root of 202042489 is about 586.7875670181.

The spelling of 202042489 in words is "two hundred two million, forty-two thousand, four hundred eighty-nine".