3934921951 has 4 divisors (see below), whose sum is σ = 3947335272. Its totient is φ = 3922508632.

The previous prime is 3934921943. The next prime is 3934921967. The reversal of 3934921951 is 1591294393.

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 3934921951 - 2³ = 3934921943 is a prime.

It is a super-2 number, since 2×3934921951² = 30967221520923292802, 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 (3934928951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6206185 + ... + 6206818.

It is an arithmetic number, because the mean of its divisors is an integer number (986833818).

Almost surely, 2^3934921951 is an apocalyptic number.

3934921951 is a deficient number, since it is larger than the sum of its proper divisors (12413321).

3934921951 is a wasteful number, since it uses less digits than its factorization.

3934921951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12413320.

The product of its digits is 262440, while the sum is 46.

The square root of 3934921951 is about 62728.9562403201. The cubic root of 3934921951 is about 1578.7451916944.

The spelling of 3934921951 in words is "three billion, nine hundred thirty-four million, nine hundred twenty-one thousand, nine hundred fifty-one".