202045691 has 4 divisors (see below), whose sum is σ = 206744472. Its totient is φ = 197346912.

The previous prime is 202045687. The next prime is 202045703. The reversal of 202045691 is 196540202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 202045691 - 2² = 202045687 is a prime.

It is a super-2 number, since 2×202045691² = 81644922503334962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202045651) 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, 2349326 + ... + 2349411.

It is an arithmetic number, because the mean of its divisors is an integer number (51686118).

Almost surely, 2^202045691 is an apocalyptic number.

202045691 is a deficient number, since it is larger than the sum of its proper divisors (4698781).

202045691 is an equidigital number, since it uses as much as digits as its factorization.

202045691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698780.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 202045691 is about 14214.2777164371. The cubic root of 202045691 is about 586.7906668345.

Adding to 202045691 its reverse (196540202), we get a palindrome (398585893).

The spelling of 202045691 in words is "two hundred two million, forty-five thousand, six hundred ninety-one".