4101971591 has 4 divisors (see below), whose sum is σ = 4102482384. Its totient is φ = 4101460800.

The previous prime is 4101971557. The next prime is 4101971707. The reversal of 4101971591 is 1951791014.

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-4101971591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4101971891) 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, 243155 + ... + 259476.

It is an arithmetic number, because the mean of its divisors is an integer number (1025620596).

Almost surely, 2^4101971591 is an apocalyptic number.

4101971591 is a deficient number, since it is larger than the sum of its proper divisors (510793).

4101971591 is an equidigital number, since it uses as much as digits as its factorization.

4101971591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510792.

The product of its (nonzero) digits is 11340, while the sum is 38.

The square root of 4101971591 is about 64046.6360631064. The cubic root of 4101971591 is about 1600.7771733513. Note that the first 3 decimals are identical.

The spelling of 4101971591 in words is "four billion, one hundred one million, nine hundred seventy-one thousand, five hundred ninety-one".