388347997 has 2 divisors, whose sum is σ = 388347998. Its totient is φ = 388347996.

The previous prime is 388347977. The next prime is 388348003. The reversal of 388347997 is 799743883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334853401 + 53494596 = 18299^2 + 7314^2 .

It is a cyclic number.

It is not a de Polignac number, because 388347997 - 2¹¹ = 388345949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388347977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194173998 + 194173999.

It is an arithmetic number, because the mean of its divisors is an integer number (194173999).

Almost surely, 2^388347997 is an apocalyptic number.

It is an amenable number.

388347997 is a deficient number, since it is larger than the sum of its proper divisors (1).

388347997 is an equidigital number, since it uses as much as digits as its factorization.

388347997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 58.

The square root of 388347997 is about 19706.5470592897. The cubic root of 388347997 is about 729.5812930083.

The spelling of 388347997 in words is "three hundred eighty-eight million, three hundred forty-seven thousand, nine hundred ninety-seven".