978611 has 2 divisors, whose sum is σ = 978612. Its totient is φ = 978610.

The previous prime is 978599. The next prime is 978617. The reversal of 978611 is 116879.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978611 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978611.

It is not a weakly prime, because it can be changed into another prime (978617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489305 + 489306.

It is an arithmetic number, because the mean of its divisors is an integer number (489306).

2⁹⁷⁸⁶¹¹ is an apocalyptic number.

978611 is a deficient number, since it is larger than the sum of its proper divisors (1).

978611 is an equidigital number, since it uses as much as digits as its factorization.

978611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 978611 is about 989.2476939574. The cubic root of 978611 is about 99.2818888409.

The spelling of 978611 in words is "nine hundred seventy-eight thousand, six hundred eleven".