387280331 has 2 divisors, whose sum is σ = 387280332. Its totient is φ = 387280330.

The previous prime is 387280319. The next prime is 387280337. The reversal of 387280331 is 133082783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 387280331 - 2¹⁰ = 387279307 is a prime.

It is a super-2 number, since 2×387280331² = 299972109558939122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 387280291 and 387280300.

It is not a weakly prime, because it can be changed into another prime (387280337) 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, 193640165 + 193640166.

It is an arithmetic number, because the mean of its divisors is an integer number (193640166).

Almost surely, 2^387280331 is an apocalyptic number.

387280331 is a deficient number, since it is larger than the sum of its proper divisors (1).

387280331 is an equidigital number, since it uses as much as digits as its factorization.

387280331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 387280331 is about 19679.4392958743. The cubic root of 387280331 is about 728.9120787286.

The spelling of 387280331 in words is "three hundred eighty-seven million, two hundred eighty thousand, three hundred thirty-one".