3997390789 has 4 divisors (see below), whose sum is σ = 4568446624. Its totient is φ = 3426334956.

The previous prime is 3997390741. The next prime is 3997390801. The reversal of 3997390789 is 9870937993.

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.

It is a cyclic number.

It is not a de Polignac number, because 3997390789 - 2¹⁹ = 3996866501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3997390789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997390729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285527907 + ... + 285527920.

It is an arithmetic number, because the mean of its divisors is an integer number (1142111656).

Almost surely, 2^3997390789 is an apocalyptic number.

It is an amenable number.

3997390789 is a deficient number, since it is larger than the sum of its proper divisors (571055835).

3997390789 is an equidigital number, since it uses as much as digits as its factorization.

3997390789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571055834.

The product of its (nonzero) digits is 23147208, while the sum is 64.

The square root of 3997390789 is about 63224.9222142661. The cubic root of 3997390789 is about 1587.0558215352.

The spelling of 3997390789 in words is "three billion, nine hundred ninety-seven million, three hundred ninety thousand, seven hundred eighty-nine".