978428611 has 2 divisors, whose sum is σ = 978428612. Its totient is φ = 978428610.

The previous prime is 978428587. The next prime is 978428663. The reversal of 978428611 is 116824879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978428611 - 2¹⁷ = 978297539 is a prime.

It is not a weakly prime, because it can be changed into another prime (978428681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489214305 + 489214306.

It is an arithmetic number, because the mean of its divisors is an integer number (489214306).

Almost surely, 2^978428611 is an apocalyptic number.

978428611 is a deficient number, since it is larger than the sum of its proper divisors (1).

978428611 is an equidigital number, since it uses as much as digits as its factorization.

978428611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 978428611 is about 31279.8435258235. The cubic root of 978428611 is about 992.7572055766.

The spelling of 978428611 in words is "nine hundred seventy-eight million, four hundred twenty-eight thousand, six hundred eleven".