378638503 has 2 divisors, whose sum is σ = 378638504. Its totient is φ = 378638502.

The previous prime is 378638461. The next prime is 378638509. The reversal of 378638503 is 305836873.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378638503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378638503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378638509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189319251 + 189319252.

It is an arithmetic number, because the mean of its divisors is an integer number (189319252).

Almost surely, 2^378638503 is an apocalyptic number.

378638503 is a deficient number, since it is larger than the sum of its proper divisors (1).

378638503 is an equidigital number, since it uses as much as digits as its factorization.

378638503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 378638503 is about 19458.6356921548. The cubic root of 378638503 is about 723.4495621638.

The spelling of 378638503 in words is "three hundred seventy-eight million, six hundred thirty-eight thousand, five hundred three".