525561629 has 2 divisors, whose sum is σ = 525561630. Its totient is φ = 525561628.

The previous prime is 525561623. The next prime is 525561649. The reversal of 525561629 is 926165525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524318404 + 1243225 = 22898^2 + 1115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525561629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525561623) 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, 262780814 + 262780815.

It is an arithmetic number, because the mean of its divisors is an integer number (262780815).

Almost surely, 2^525561629 is an apocalyptic number.

It is an amenable number.

525561629 is a deficient number, since it is larger than the sum of its proper divisors (1).

525561629 is an equidigital number, since it uses as much as digits as its factorization.

525561629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 41.

The square root of 525561629 is about 22925.1309483719. The cubic root of 525561629 is about 807.0018866268.

The spelling of 525561629 in words is "five hundred twenty-five million, five hundred sixty-one thousand, six hundred twenty-nine".