397788887793 has 32 divisors (see below), whose sum is σ = 593292188160. Its totient is φ = 235037468160.

The previous prime is 397788887773. The next prime is 397788887803.

It is a happy number.

397788887793 is nontrivially palindromic in base 10.

397788887793 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 397788887793 - 2⁹ = 397788887281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397788887773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 712923 + ... + 1141856.

It is an arithmetic number, because the mean of its divisors is an integer number (18540380880).

Almost surely, 2^397788887793 is an apocalyptic number.

397788887793 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

397788887793 is a deficient number, since it is larger than the sum of its proper divisors (195503300367).

397788887793 is a wasteful number, since it uses less digits than its factorization.

397788887793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854957.

The product of its digits is 7169347584, while the sum is 84.

The spelling of 397788887793 in words is "three hundred ninety-seven billion, seven hundred eighty-eight million, eight hundred eighty-seven thousand, seven hundred ninety-three".