3957340591 has 4 divisors (see below), whose sum is σ = 3957750184. Its totient is φ = 3956931000.

The previous prime is 3957340567. The next prime is 3957340627. The reversal of 3957340591 is 1950437593.

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-3957340591 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 (3957340511) 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, 189945 + ... + 209746.

It is an arithmetic number, because the mean of its divisors is an integer number (989437546).

Almost surely, 2^3957340591 is an apocalyptic number.

3957340591 is a deficient number, since it is larger than the sum of its proper divisors (409593).

3957340591 is an equidigital number, since it uses as much as digits as its factorization.

3957340591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409592.

The product of its (nonzero) digits is 510300, while the sum is 46.

The square root of 3957340591 is about 62907.3969498023. The cubic root of 3957340591 is about 1581.7377386378.

The spelling of 3957340591 in words is "three billion, nine hundred fifty-seven million, three hundred forty thousand, five hundred ninety-one".