387997123 has 2 divisors, whose sum is σ = 387997124. Its totient is φ = 387997122.

The previous prime is 387997121. The next prime is 387997151. The reversal of 387997123 is 321799783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 387997123 - 2¹ = 387997121 is a prime.

Together with 387997121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (387997121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193998561 + 193998562.

It is an arithmetic number, because the mean of its divisors is an integer number (193998562).

Almost surely, 2^387997123 is an apocalyptic number.

387997123 is a deficient number, since it is larger than the sum of its proper divisors (1).

387997123 is an equidigital number, since it uses as much as digits as its factorization.

387997123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 387997123 is about 19697.6425746839. The cubic root of 387997123 is about 729.3615002420.

The spelling of 387997123 in words is "three hundred eighty-seven million, nine hundred ninety-seven thousand, one hundred twenty-three".