978654613 has 2 divisors, whose sum is σ = 978654614. Its totient is φ = 978654612.

The previous prime is 978654559. The next prime is 978654637. The reversal of 978654613 is 316456879.

978654613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856264644 + 122389969 = 29262^2 + 11063^2 .

It is a cyclic number.

It is not a de Polignac number, because 978654613 - 2²⁵ = 945100181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978654643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489327306 + 489327307.

It is an arithmetic number, because the mean of its divisors is an integer number (489327307).

Almost surely, 2^978654613 is an apocalyptic number.

It is an amenable number.

978654613 is a deficient number, since it is larger than the sum of its proper divisors (1).

978654613 is an equidigital number, since it uses as much as digits as its factorization.

978654613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 978654613 is about 31283.4558992449. The cubic root of 978654613 is about 992.8336369206.

The spelling of 978654613 in words is "nine hundred seventy-eight million, six hundred fifty-four thousand, six hundred thirteen".