1681524629 has 2 divisors, whose sum is σ = 1681524630. Its totient is φ = 1681524628.

The previous prime is 1681524619. The next prime is 1681524667. The reversal of 1681524629 is 9264251861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1262380900 + 419143729 = 35530^2 + 20473^2 .

It is an emirp because it is prime and its reverse (9264251861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1681524629 - 2⁴ = 1681524613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1681524629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1681524619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840762314 + 840762315.

It is an arithmetic number, because the mean of its divisors is an integer number (840762315).

Almost surely, 2^1681524629 is an apocalyptic number.

It is an amenable number.

1681524629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681524629 is an equidigital number, since it uses as much as digits as its factorization.

1681524629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 1681524629 is about 41006.3974155253. The cubic root of 1681524629 is about 1189.1438959405.

The spelling of 1681524629 in words is "one billion, six hundred eighty-one million, five hundred twenty-four thousand, six hundred twenty-nine".