978837971 has 2 divisors, whose sum is σ = 978837972. Its totient is φ = 978837970.

The previous prime is 978837949. The next prime is 978838013. The reversal of 978837971 is 179738879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978837971 - 2¹⁴ = 978821587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 978837971.

It is not a weakly prime, because it can be changed into another prime (978837911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489418985 + 489418986.

It is an arithmetic number, because the mean of its divisors is an integer number (489418986).

Almost surely, 2^978837971 is an apocalyptic number.

978837971 is a deficient number, since it is larger than the sum of its proper divisors (1).

978837971 is an equidigital number, since it uses as much as digits as its factorization.

978837971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 59.

The square root of 978837971 is about 31286.3863525336. The cubic root of 978837971 is about 992.8956378961.

The spelling of 978837971 in words is "nine hundred seventy-eight million, eight hundred thirty-seven thousand, nine hundred seventy-one".