30400042391 has 2 divisors, whose sum is σ = 30400042392. Its totient is φ = 30400042390.

The previous prime is 30400042369. The next prime is 30400042487. The reversal of 30400042391 is 19324000403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30400042391 - 2³⁰ = 29326300567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30400042391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30400042291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15200021195 + 15200021196.

It is an arithmetic number, because the mean of its divisors is an integer number (15200021196).

Almost surely, 2^30400042391 is an apocalyptic number.

30400042391 is a deficient number, since it is larger than the sum of its proper divisors (1).

30400042391 is an equidigital number, since it uses as much as digits as its factorization.

30400042391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 30400042391 its reverse (19324000403), we get a palindrome (49724042794).

The spelling of 30400042391 in words is "thirty billion, four hundred million, forty-two thousand, three hundred ninety-one".