3501685409 has 2 divisors, whose sum is σ = 3501685410. Its totient is φ = 3501685408.

The previous prime is 3501685373. The next prime is 3501685457. The reversal of 3501685409 is 9045861053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3312347809 + 189337600 = 57553^2 + 13760^2 .

It is an emirp because it is prime and its reverse (9045861053) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3501685409 - 2¹⁶ = 3501619873 is a prime.

It is not a weakly prime, because it can be changed into another prime (3501685489) 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, 1750842704 + 1750842705.

It is an arithmetic number, because the mean of its divisors is an integer number (1750842705).

Almost surely, 2^3501685409 is an apocalyptic number.

It is an amenable number.

3501685409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3501685409 is an equidigital number, since it uses as much as digits as its factorization.

3501685409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 3501685409 is about 59175.0404224619. The cubic root of 3501685409 is about 1518.5381560856.

The spelling of 3501685409 in words is "three billion, five hundred one million, six hundred eighty-five thousand, four hundred nine".