3948431951 has 4 divisors (see below), whose sum is σ = 4180692672. Its totient is φ = 3716171232.

The previous prime is 3948431947. The next prime is 3948431953. The reversal of 3948431951 is 1591348493.

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 3948431951 - 2² = 3948431947 is a prime.

It is a super-2 number, since 2×3948431951² = 31180229743355332802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3948431896 and 3948431905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3948431953) 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, 116130335 + ... + 116130368.

It is an arithmetic number, because the mean of its divisors is an integer number (1045173168).

Almost surely, 2^3948431951 is an apocalyptic number.

3948431951 is a deficient number, since it is larger than the sum of its proper divisors (232260721).

3948431951 is a wasteful number, since it uses less digits than its factorization.

3948431951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232260720.

The product of its digits is 466560, while the sum is 47.

The square root of 3948431951 is about 62836.5494835609. The cubic root of 3948431951 is about 1580.5499275439.

The spelling of 3948431951 in words is "three billion, nine hundred forty-eight million, four hundred thirty-one thousand, nine hundred fifty-one".