87461629 has 2 divisors, whose sum is σ = 87461630. Its totient is φ = 87461628.

The previous prime is 87461609. The next prime is 87461669. The reversal of 87461629 is 92616478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47582404 + 39879225 = 6898^2 + 6315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87461629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87461609) 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, 43730814 + 43730815.

It is an arithmetic number, because the mean of its divisors is an integer number (43730815).

Almost surely, 2^87461629 is an apocalyptic number.

It is an amenable number.

87461629 is a deficient number, since it is larger than the sum of its proper divisors (1).

87461629 is an equidigital number, since it uses as much as digits as its factorization.

87461629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 87461629 is about 9352.0922258070. The cubic root of 87461629 is about 443.8870965935.

The spelling of 87461629 in words is "eighty-seven million, four hundred sixty-one thousand, six hundred twenty-nine".