632389561 has 2 divisors, whose sum is σ = 632389562. Its totient is φ = 632389560.

The previous prime is 632389547. The next prime is 632389567. The reversal of 632389561 is 165983236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413349561 + 219040000 = 20331^2 + 14800^2 .

It is a cyclic number.

It is not a de Polignac number, because 632389561 - 2⁵ = 632389529 is a prime.

It is not a weakly prime, because it can be changed into another prime (632389567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316194780 + 316194781.

It is an arithmetic number, because the mean of its divisors is an integer number (316194781).

Almost surely, 2^632389561 is an apocalyptic number.

It is an amenable number.

632389561 is a deficient number, since it is larger than the sum of its proper divisors (1).

632389561 is an equidigital number, since it uses as much as digits as its factorization.

632389561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 632389561 is about 25147.3569386526. The cubic root of 632389561 is about 858.3443724054.

The spelling of 632389561 in words is "six hundred thirty-two million, three hundred eighty-nine thousand, five hundred sixty-one".