3921016403 has 4 divisors (see below), whose sum is σ = 3923105040. Its totient is φ = 3918927768.

The previous prime is 3921016399. The next prime is 3921016433. The reversal of 3921016403 is 3046101293.

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

It is a cyclic number.

It is not a de Polignac number, because 3921016403 - 2² = 3921016399 is a prime.

It is a super-4 number, since 4×3921016403⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921016433) 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, 1041500 + ... + 1045257.

It is an arithmetic number, because the mean of its divisors is an integer number (980776260).

Almost surely, 2^3921016403 is an apocalyptic number.

3921016403 is a deficient number, since it is larger than the sum of its proper divisors (2088637).

3921016403 is a wasteful number, since it uses less digits than its factorization.

3921016403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088636.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 3921016403 is about 62618.0197946246. The cubic root of 3921016403 is about 1576.8832972403.

Adding to 3921016403 its reverse (3046101293), we get a palindrome (6967117696).

The spelling of 3921016403 in words is "three billion, nine hundred twenty-one million, sixteen thousand, four hundred three".