1001378473 has 2 divisors, whose sum is σ = 1001378474. Its totient is φ = 1001378472.

The previous prime is 1001378467. The next prime is 1001378491. The reversal of 1001378473 is 3748731001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980190864 + 21187609 = 31308^2 + 4603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001378473 - 2⁹ = 1001377961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001378423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500689236 + 500689237.

It is an arithmetic number, because the mean of its divisors is an integer number (500689237).

Almost surely, 2^1001378473 is an apocalyptic number.

It is an amenable number.

1001378473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001378473 is an equidigital number, since it uses as much as digits as its factorization.

1001378473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 1001378473 is about 31644.5646675697. The cubic root of 1001378473 is about 1000.4592800296.

The spelling of 1001378473 in words is "one billion, one million, three hundred seventy-eight thousand, four hundred seventy-three".