3971551794 has 64 divisors (see below), whose sum is σ = 9570189312. Its totient is φ = 1074744000.

The previous prime is 3971551693. The next prime is 3971551799. The reversal of 3971551794 is 4971551793.

It is not an unprimeable number, because it can be changed into a prime (3971551799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28744 + ... + 93644.

It is an arithmetic number, because the mean of its divisors is an integer number (149534208).

Almost surely, 2^3971551794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3971551794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4785094656).

3971551794 is an abundant number, since it is smaller than the sum of its proper divisors (5598637518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3971551794 is a wasteful number, since it uses less digits than its factorization.

3971551794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64991.

The product of its digits is 1190700, while the sum is 51.

The square root of 3971551794 is about 63020.2490791650. The cubic root of 3971551794 is about 1583.6288691204.

Subtracting 3971551794 from its reverse (4971551793), we obtain a palindrome (999999999).

The spelling of 3971551794 in words is "three billion, nine hundred seventy-one million, five hundred fifty-one thousand, seven hundred ninety-four".