3990997071 has 24 divisors (see below), whose sum is σ = 5957812224. Its totient is φ = 2571774480.

The previous prime is 3990997069. The next prime is 3990997079. The reversal of 3990997071 is 1707990993.

It is not a de Polignac number, because 3990997071 - 2¹ = 3990997069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3990996999 and 3990997017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990997079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239410 + ... + 255536.

It is an arithmetic number, because the mean of its divisors is an integer number (248242176).

Almost surely, 2^3990997071 is an apocalyptic number.

3990997071 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3990997071 is a deficient number, since it is larger than the sum of its proper divisors (1966815153).

3990997071 is a wasteful number, since it uses less digits than its factorization.

3990997071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17051 (or 17048 counting only the distinct ones).

The product of its (nonzero) digits is 964467, while the sum is 54.

The square root of 3990997071 is about 63174.3387064716. The cubic root of 3990997071 is about 1586.2092191078.

The spelling of 3990997071 in words is "three billion, nine hundred ninety million, nine hundred ninety-seven thousand, seventy-one".