1000378513 has 2 divisors, whose sum is σ = 1000378514. Its totient is φ = 1000378512.

The previous prime is 1000378471. The next prime is 1000378517. The reversal of 1000378513 is 3158730001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 928603729 + 71774784 = 30473^2 + 8472^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000378513 - 2²⁵ = 966824081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000378517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500189256 + 500189257.

It is an arithmetic number, because the mean of its divisors is an integer number (500189257).

Almost surely, 2^1000378513 is an apocalyptic number.

It is an amenable number.

1000378513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000378513 is an equidigital number, since it uses as much as digits as its factorization.

1000378513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1000378513 is about 31628.7608514782. The cubic root of 1000378513 is about 1000.1261550842.

The spelling of 1000378513 in words is "one billion, three hundred seventy-eight thousand, five hundred thirteen".