978673001 has 2 divisors, whose sum is σ = 978673002. Its totient is φ = 978673000.

The previous prime is 978672979. The next prime is 978673043. The reversal of 978673001 is 100376879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606144400 + 372528601 = 24620^2 + 19301^2 .

It is an emirp because it is prime and its reverse (100376879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978673001 - 2¹⁸ = 978410857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 978673001.

It is not a weakly prime, because it can be changed into another prime (978672001) 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, 489336500 + 489336501.

It is an arithmetic number, because the mean of its divisors is an integer number (489336501).

Almost surely, 2^978673001 is an apocalyptic number.

It is an amenable number.

978673001 is a deficient number, since it is larger than the sum of its proper divisors (1).

978673001 is an equidigital number, since it uses as much as digits as its factorization.

978673001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 978673001 is about 31283.7497912255. The cubic root of 978673001 is about 992.8398550185.

The spelling of 978673001 in words is "nine hundred seventy-eight million, six hundred seventy-three thousand, one".