53404423 has 2 divisors, whose sum is σ = 53404424. Its totient is φ = 53404422.

The previous prime is 53404397. The next prime is 53404433. The reversal of 53404423 is 32440435.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53404423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53404433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26702211 + 26702212.

It is an arithmetic number, because the mean of its divisors is an integer number (26702212).

Almost surely, 2^53404423 is an apocalyptic number.

53404423 is a deficient number, since it is larger than the sum of its proper divisors (1).

53404423 is an equidigital number, since it uses as much as digits as its factorization.

53404423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 53404423 is about 7307.8329893341. The cubic root of 53404423 is about 376.5815821428.

Adding to 53404423 its reverse (32440435), we get a palindrome (85844858).

The spelling of 53404423 in words is "fifty-three million, four hundred four thousand, four hundred twenty-three".