978389441 has 2 divisors, whose sum is σ = 978389442. Its totient is φ = 978389440.

The previous prime is 978389413. The next prime is 978389471. The reversal of 978389441 is 144983879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913248400 + 65141041 = 30220^2 + 8071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978389441 is a prime.

It is not a weakly prime, because it can be changed into another prime (978389411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489194720 + 489194721.

It is an arithmetic number, because the mean of its divisors is an integer number (489194721).

Almost surely, 2^978389441 is an apocalyptic number.

It is an amenable number.

978389441 is a deficient number, since it is larger than the sum of its proper divisors (1).

978389441 is an equidigital number, since it uses as much as digits as its factorization.

978389441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 978389441 is about 31279.2173974989. The cubic root of 978389441 is about 992.7439575248.

The spelling of 978389441 in words is "nine hundred seventy-eight million, three hundred eighty-nine thousand, four hundred forty-one".