1004202391 has 2 divisors, whose sum is σ = 1004202392. Its totient is φ = 1004202390.

The previous prime is 1004202389. The next prime is 1004202431. The reversal of 1004202391 is 1932024001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1004202391 - 2¹ = 1004202389 is a prime.

Together with 1004202389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004202371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502101195 + 502101196.

It is an arithmetic number, because the mean of its divisors is an integer number (502101196).

Almost surely, 2^1004202391 is an apocalyptic number.

1004202391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004202391 is an equidigital number, since it uses as much as digits as its factorization.

1004202391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1004202391 is about 31689.1525762366. The cubic root of 1004202391 is about 1001.3988393361.

Adding to 1004202391 its reverse (1932024001), we get a palindrome (2936226392).

The spelling of 1004202391 in words is "one billion, four million, two hundred two thousand, three hundred ninety-one".