3521398613 has 4 divisors (see below), whose sum is σ = 3603291648. Its totient is φ = 3439505580.

The previous prime is 3521398609. The next prime is 3521398619. The reversal of 3521398613 is 3168931253.

It is a happy number.

3521398613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3521398613 - 2² = 3521398609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521398619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40946453 + ... + 40946538.

It is an arithmetic number, because the mean of its divisors is an integer number (900822912).

Almost surely, 2^3521398613 is an apocalyptic number.

It is an amenable number.

3521398613 is a deficient number, since it is larger than the sum of its proper divisors (81893035).

3521398613 is an equidigital number, since it uses as much as digits as its factorization.

3521398613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81893034.

The product of its digits is 116640, while the sum is 41.

The square root of 3521398613 is about 59341.3735348281. The cubic root of 3521398613 is about 1521.3824295490.

The spelling of 3521398613 in words is "three billion, five hundred twenty-one million, three hundred ninety-eight thousand, six hundred thirteen".