387403 has 2 divisors, whose sum is σ = 387404. Its totient is φ = 387402.

The previous prime is 387397. The next prime is 387433. The reversal of 387403 is 304783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 387403 - 2⁵ = 387371 is a prime.

387403 is a lucky number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (387433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193701 + 193702.

It is an arithmetic number, because the mean of its divisors is an integer number (193702).

2³⁸⁷⁴⁰³ is an apocalyptic number.

387403 is a deficient number, since it is larger than the sum of its proper divisors (1).

387403 is an equidigital number, since it uses as much as digits as its factorization.

387403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 387403 is about 622.4170627481. The cubic root of 387403 is about 72.8989030289.

It can be divided in two parts, 387 and 403, that multiplied together give a triangular number (155961 = T₅₅₈).

The spelling of 387403 in words is "three hundred eighty-seven thousand, four hundred three".