978049873 has 2 divisors, whose sum is σ = 978049874. Its totient is φ = 978049872.

The previous prime is 978049847. The next prime is 978049883. The reversal of 978049873 is 378940879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967956544 + 10093329 = 31112^2 + 3177^2 .

It is a cyclic number.

It is not a de Polignac number, because 978049873 - 2²⁵ = 944495441 is a prime.

It is a super-2 number, since 2×978049873² = 1913163108150632258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (978049883) 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, 489024936 + 489024937.

It is an arithmetic number, because the mean of its divisors is an integer number (489024937).

Almost surely, 2^978049873 is an apocalyptic number.

It is an amenable number.

978049873 is a deficient number, since it is larger than the sum of its proper divisors (1).

978049873 is an equidigital number, since it uses as much as digits as its factorization.

978049873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 978049873 is about 31273.7889134016. The cubic root of 978049873 is about 992.6290942359.

The spelling of 978049873 in words is "nine hundred seventy-eight million, forty-nine thousand, eight hundred seventy-three".