3927542491 has 4 divisors (see below), whose sum is σ = 4098305232. Its totient is φ = 3756779752.

The previous prime is 3927542449. The next prime is 3927542501. The reversal of 3927542491 is 1942457293.

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

It is a cyclic number.

It is not a de Polignac number, because 3927542491 - 2¹⁹ = 3927018203 is a prime.

It is a super-2 number, since 2×3927542491² = 30851180037220970162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3927542431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85381336 + ... + 85381381.

It is an arithmetic number, because the mean of its divisors is an integer number (1024576308).

Almost surely, 2^3927542491 is an apocalyptic number.

3927542491 is a deficient number, since it is larger than the sum of its proper divisors (170762741).

3927542491 is a wasteful number, since it uses less digits than its factorization.

3927542491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170762740.

The product of its digits is 544320, while the sum is 46.

The square root of 3927542491 is about 62670.1084329683. The cubic root of 3927542491 is about 1577.7576602494.

The spelling of 3927542491 in words is "three billion, nine hundred twenty-seven million, five hundred forty-two thousand, four hundred ninety-one".