553561387 has 2 divisors, whose sum is σ = 553561388. Its totient is φ = 553561386.

The previous prime is 553561363. The next prime is 553561391. The reversal of 553561387 is 783165355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-553561387 is a prime.

It is not a weakly prime, because it can be changed into another prime (553567387) 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, 276780693 + 276780694.

It is an arithmetic number, because the mean of its divisors is an integer number (276780694).

Almost surely, 2^553561387 is an apocalyptic number.

553561387 is a deficient number, since it is larger than the sum of its proper divisors (1).

553561387 is an equidigital number, since it uses as much as digits as its factorization.

553561387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 43.

The square root of 553561387 is about 23527.8853065889. The cubic root of 553561387 is about 821.0859036883.

The spelling of 553561387 in words is "five hundred fifty-three million, five hundred sixty-one thousand, three hundred eighty-seven".