387356381 has 2 divisors, whose sum is σ = 387356382. Its totient is φ = 387356380.

The previous prime is 387356351. The next prime is 387356483. The reversal of 387356381 is 183653783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311840281 + 75516100 = 17659^2 + 8690^2 .

It is a cyclic number.

It is not a de Polignac number, because 387356381 - 2¹⁸ = 387094237 is a prime.

It is a super-2 number, since 2×387356381² = 300089931802834322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387356351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193678190 + 193678191.

It is an arithmetic number, because the mean of its divisors is an integer number (193678191).

Almost surely, 2^387356381 is an apocalyptic number.

It is an amenable number.

387356381 is a deficient number, since it is larger than the sum of its proper divisors (1).

387356381 is an equidigital number, since it uses as much as digits as its factorization.

387356381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 387356381 is about 19681.3714207115. The cubic root of 387356381 is about 728.9597876112.

The spelling of 387356381 in words is "three hundred eighty-seven million, three hundred fifty-six thousand, three hundred eighty-one".