3921641903 has 4 divisors (see below), whose sum is σ = 3976876368. Its totient is φ = 3866407440.

The previous prime is 3921641897. The next prime is 3921641921. The reversal of 3921641903 is 3091461293.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3921641903 is a prime.

It is a super-2 number, since 2×3921641903² = 30758550430730922818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921641953) 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, 27617126 + ... + 27617267.

It is an arithmetic number, because the mean of its divisors is an integer number (994219092).

Almost surely, 2^3921641903 is an apocalyptic number.

3921641903 is a deficient number, since it is larger than the sum of its proper divisors (55234465).

3921641903 is an equidigital number, since it uses as much as digits as its factorization.

3921641903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55234464.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 3921641903 is about 62623.0141641234. The cubic root of 3921641903 is about 1576.9671435323.

The spelling of 3921641903 in words is "three billion, nine hundred twenty-one million, six hundred forty-one thousand, nine hundred three".