202604421109 has 2 divisors, whose sum is σ = 202604421110. Its totient is φ = 202604421108.

The previous prime is 202604421073. The next prime is 202604421139. The reversal of 202604421109 is 901124406202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109890261009 + 92714160100 = 331497^2 + 304490^2 .

It is a cyclic number.

It is not a de Polignac number, because 202604421109 - 2¹⁹ = 202603896821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202604421139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101302210554 + 101302210555.

It is an arithmetic number, because the mean of its divisors is an integer number (101302210555).

Almost surely, 2^202604421109 is an apocalyptic number.

It is an amenable number.

202604421109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202604421109 is an equidigital number, since it uses as much as digits as its factorization.

202604421109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 202604421109 in words is "two hundred two billion, six hundred four million, four hundred twenty-one thousand, one hundred nine".