978525913 has 2 divisors, whose sum is σ = 978525914. Its totient is φ = 978525912.

The previous prime is 978525871. The next prime is 978525923. The reversal of 978525913 is 319525879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975187984 + 3337929 = 31228^2 + 1827^2 .

It is a cyclic number.

It is not a de Polignac number, because 978525913 - 2¹³ = 978517721 is a prime.

It is not a weakly prime, because it can be changed into another prime (978525923) 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, 489262956 + 489262957.

It is an arithmetic number, because the mean of its divisors is an integer number (489262957).

Almost surely, 2^978525913 is an apocalyptic number.

It is an amenable number.

978525913 is a deficient number, since it is larger than the sum of its proper divisors (1).

978525913 is an equidigital number, since it uses as much as digits as its factorization.

978525913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 49.

The square root of 978525913 is about 31281.3988338118. The cubic root of 978525913 is about 992.7901134654.

The spelling of 978525913 in words is "nine hundred seventy-eight million, five hundred twenty-five thousand, nine hundred thirteen".