3954172643 has 4 divisors (see below), whose sum is σ = 4028779728. Its totient is φ = 3879565560.

The previous prime is 3954172603. The next prime is 3954172657. The reversal of 3954172643 is 3462714593.

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-3954172643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3954172594 and 3954172603.

It is not an unprimeable number, because it can be changed into a prime (3954172603) 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, 37303463 + ... + 37303568.

It is an arithmetic number, because the mean of its divisors is an integer number (1007194932).

Almost surely, 2^3954172643 is an apocalyptic number.

3954172643 is a deficient number, since it is larger than the sum of its proper divisors (74607085).

3954172643 is an equidigital number, since it uses as much as digits as its factorization.

3954172643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74607084.

The product of its digits is 544320, while the sum is 44.

The square root of 3954172643 is about 62882.2124531254. The cubic root of 3954172643 is about 1581.3155527032.

The spelling of 3954172643 in words is "three billion, nine hundred fifty-four million, one hundred seventy-two thousand, six hundred forty-three".