3501989921 has 4 divisors (see below), whose sum is σ = 3686305200. Its totient is φ = 3317674644.

The previous prime is 3501989903. The next prime is 3501989929. The reversal of 3501989921 is 1299891053.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1299891053 = 67 ⋅19401359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3501989921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3501989929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92157611 + ... + 92157648.

It is an arithmetic number, because the mean of its divisors is an integer number (921576300).

Almost surely, 2^3501989921 is an apocalyptic number.

It is an amenable number.

3501989921 is a deficient number, since it is larger than the sum of its proper divisors (184315279).

3501989921 is a wasteful number, since it uses less digits than its factorization.

3501989921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184315278.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 3501989921 is about 59177.6133432230. The cubic root of 3501989921 is about 1518.5821729549.

The spelling of 3501989921 in words is "three billion, five hundred one million, nine hundred eighty-nine thousand, nine hundred twenty-one".