3991197677 has 8 divisors (see below), whose sum is σ = 4050756864. Its totient is φ = 3931911808.

The previous prime is 3991197667. The next prime is 3991197697. The reversal of 3991197677 is 7767911993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3991197677 - 2¹⁰ = 3991196653 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 (3991197667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38813 + ... + 97410.

It is an arithmetic number, because the mean of its divisors is an integer number (506344608).

Almost surely, 2^3991197677 is an apocalyptic number.

It is an amenable number.

3991197677 is a deficient number, since it is larger than the sum of its proper divisors (59559187).

3991197677 is a wasteful number, since it uses less digits than its factorization.

3991197677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136659.

The product of its digits is 4500846, while the sum is 59.

The square root of 3991197677 is about 63175.9264039713. The cubic root of 3991197677 is about 1586.2357954035.

The spelling of 3991197677 in words is "three billion, nine hundred ninety-one million, one hundred ninety-seven thousand, six hundred seventy-seven".