551381693 has 2 divisors, whose sum is σ = 551381694. Its totient is φ = 551381692.

The previous prime is 551381657. The next prime is 551381711. The reversal of 551381693 is 396183155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509946724 + 41434969 = 22582^2 + 6437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551381693 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551381693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551381603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275690846 + 275690847.

It is an arithmetic number, because the mean of its divisors is an integer number (275690847).

Almost surely, 2^551381693 is an apocalyptic number.

It is an amenable number.

551381693 is a deficient number, since it is larger than the sum of its proper divisors (1).

551381693 is an equidigital number, since it uses as much as digits as its factorization.

551381693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 551381693 is about 23481.5181153178. The cubic root of 551381693 is about 820.0067880660.

The spelling of 551381693 in words is "five hundred fifty-one million, three hundred eighty-one thousand, six hundred ninety-three".