387831137 has 2 divisors, whose sum is σ = 387831138. Its totient is φ = 387831136.

The previous prime is 387830999. The next prime is 387831139. The reversal of 387831137 is 731138783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225930961 + 161900176 = 15031^2 + 12724^2 .

It is a cyclic number.

It is not a de Polignac number, because 387831137 - 2¹⁶ = 387765601 is a prime.

Together with 387831139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 387831094 and 387831103.

It is not a weakly prime, because it can be changed into another prime (387831139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193915568 + 193915569.

It is an arithmetic number, because the mean of its divisors is an integer number (193915569).

Almost surely, 2^387831137 is an apocalyptic number.

It is an amenable number.

387831137 is a deficient number, since it is larger than the sum of its proper divisors (1).

387831137 is an equidigital number, since it uses as much as digits as its factorization.

387831137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 387831137 is about 19693.4287771327. The cubic root of 387831137 is about 729.2574779364.

The spelling of 387831137 in words is "three hundred eighty-seven million, eight hundred thirty-one thousand, one hundred thirty-seven".