4001391793 has 6 divisors (see below), whose sum is σ = 4654680306. Its totient is φ = 3429764352.

The previous prime is 4001391781. The next prime is 4001391799. The reversal of 4001391793 is 3971931004.

It can be written as a sum of positive squares in only one way, i.e., 2718892449 + 1282499344 = 52143^2 + 35812^2 .

It is not a de Polignac number, because 4001391793 - 2¹⁷ = 4001260721 is a prime.

It is a super-2 number, since 2×4001391793² = 32022272562175509698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001391799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40830480 + ... + 40830577.

It is an arithmetic number, because the mean of its divisors is an integer number (775780051).

Almost surely, 2^4001391793 is an apocalyptic number.

It is an amenable number.

4001391793 is a deficient number, since it is larger than the sum of its proper divisors (653288513).

4001391793 is an equidigital number, since it uses as much as digits as its factorization.

4001391793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81661071 (or 81661064 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 4001391793 is about 63256.5553361863. Note that the first 3 decimals coincide. The cubic root of 4001391793 is about 1587.5851417580.

The spelling of 4001391793 in words is "four billion, one million, three hundred ninety-one thousand, seven hundred ninety-three".