4291981957 has 4 divisors (see below), whose sum is σ = 4292957196. Its totient is φ = 4291006720.

The previous prime is 4291981943. The next prime is 4291981973. The reversal of 4291981957 is 7591891924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1710732321 + 2581249636 = 41361^2 + 50806^2 .

It is a cyclic number.

It is not a de Polignac number, because 4291981957 - 2³¹ = 2144498309 is a prime.

It is a super-2 number, since 2×4291981957² = 36842218238427099698, 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 = 4291981898 and 4291981907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4291981937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480988 + ... + 489829.

It is an arithmetic number, because the mean of its divisors is an integer number (1073239299).

Almost surely, 2^4291981957 is an apocalyptic number.

It is an amenable number.

4291981957 is a deficient number, since it is larger than the sum of its proper divisors (975239).

4291981957 is an equidigital number, since it uses as much as digits as its factorization.

4291981957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975238.

The product of its digits is 1632960, while the sum is 55.

The square root of 4291981957 is about 65513.2197117498. The cubic root of 4291981957 is about 1625.1219735820.

The spelling of 4291981957 in words is "four billion, two hundred ninety-one million, nine hundred eighty-one thousand, nine hundred fifty-seven".