3991552797 has 16 divisors (see below), whose sum is σ = 5341673088. Its totient is φ = 2651251200.

The previous prime is 3991552781. The next prime is 3991552811. The reversal of 3991552797 is 7972551993.

It is not a de Polignac number, because 3991552797 - 2⁴ = 3991552781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991552727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1469913 + ... + 1472625.

It is an arithmetic number, because the mean of its divisors is an integer number (333854568).

Almost surely, 2^3991552797 is an apocalyptic number.

It is an amenable number.

3991552797 is a deficient number, since it is larger than the sum of its proper divisors (1350120291).

3991552797 is a wasteful number, since it uses less digits than its factorization.

3991552797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340.

The product of its digits is 5358150, while the sum is 57.

The square root of 3991552797 is about 63178.7369057027. The cubic root of 3991552797 is about 1586.2828395404.

The spelling of 3991552797 in words is "three billion, nine hundred ninety-one million, five hundred fifty-two thousand, seven hundred ninety-seven".