3991757953 has 4 divisors (see below), whose sum is σ = 4047979968. Its totient is φ = 3935535940.

The previous prime is 3991757941. The next prime is 3991757993. The reversal of 3991757953 is 3597571993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3597571993 = 9319 ⋅386047.

It is a cyclic number.

It is not a de Polignac number, because 3991757953 - 2¹³ = 3991749761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3991757993) 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, 28110901 + ... + 28111042.

It is an arithmetic number, because the mean of its divisors is an integer number (1011994992).

Almost surely, 2^3991757953 is an apocalyptic number.

It is an amenable number.

3991757953 is a deficient number, since it is larger than the sum of its proper divisors (56222015).

3991757953 is an equidigital number, since it uses as much as digits as its factorization.

3991757953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56222014.

The product of its digits is 8037225, while the sum is 58.

The square root of 3991757953 is about 63180.3605007126. The cubic root of 3991757953 is about 1586.3100160875.

The spelling of 3991757953 in words is "three billion, nine hundred ninety-one million, seven hundred fifty-seven thousand, nine hundred fifty-three".