3508605421 has 4 divisors (see below), whose sum is σ = 3509789344. Its totient is φ = 3507421500.

The previous prime is 3508605407. The next prime is 3508605427. The reversal of 3508605421 is 1245068053.

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 3508605421 - 2¹⁹ = 3508081133 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 (3508605427) 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, 587505 + ... + 593446.

It is an arithmetic number, because the mean of its divisors is an integer number (877447336).

Almost surely, 2^3508605421 is an apocalyptic number.

It is an amenable number.

3508605421 is a deficient number, since it is larger than the sum of its proper divisors (1183923).

3508605421 is a wasteful number, since it uses less digits than its factorization.

3508605421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183922.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 3508605421 is about 59233.4822629904. The cubic root of 3508605421 is about 1519.5378068704.

The spelling of 3508605421 in words is "three billion, five hundred eight million, six hundred five thousand, four hundred twenty-one".