3948921455 has 4 divisors (see below), whose sum is σ = 4738705752. Its totient is φ = 3159137160.

The previous prime is 3948921443. The next prime is 3948921467. The reversal of 3948921455 is 5541298493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5541298493 = 1061 ⋅5222713.

It is an interprime number because it is at equal distance from previous prime (3948921443) and next prime (3948921467).

It is a de Polignac number, because none of the positive numbers 2^k-3948921455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394892141 + ... + 394892150.

It is an arithmetic number, because the mean of its divisors is an integer number (1184676438).

Almost surely, 2^3948921455 is an apocalyptic number.

3948921455 is a deficient number, since it is larger than the sum of its proper divisors (789784297).

3948921455 is an equidigital number, since it uses as much as digits as its factorization.

3948921455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789784296.

The product of its digits is 1555200, while the sum is 50.

The square root of 3948921455 is about 62840.4444207709. Note that the first 4 decimals coincide. The cubic root of 3948921455 is about 1580.6152406902.

The spelling of 3948921455 in words is "three billion, nine hundred forty-eight million, nine hundred twenty-one thousand, four hundred fifty-five".