551634439 has 2 divisors, whose sum is σ = 551634440. Its totient is φ = 551634438.

The previous prime is 551634379. The next prime is 551634451. The reversal of 551634439 is 934436155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551634439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551634469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275817219 + 275817220.

It is an arithmetic number, because the mean of its divisors is an integer number (275817220).

Almost surely, 2^551634439 is an apocalyptic number.

551634439 is a deficient number, since it is larger than the sum of its proper divisors (1).

551634439 is an equidigital number, since it uses as much as digits as its factorization.

551634439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

The square root of 551634439 is about 23486.8993057832. The cubic root of 551634439 is about 820.1320623112.

The spelling of 551634439 in words is "five hundred fifty-one million, six hundred thirty-four thousand, four hundred thirty-nine".