978052147 has 2 divisors, whose sum is σ = 978052148. Its totient is φ = 978052146.

The previous prime is 978052133. The next prime is 978052181. The reversal of 978052147 is 741250879.

It is a weak prime.

It is an emirp because it is prime and its reverse (741250879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978052147 - 2¹⁵ = 978019379 is a prime.

It is not a weakly prime, because it can be changed into another prime (978052247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489026073 + 489026074.

It is an arithmetic number, because the mean of its divisors is an integer number (489026074).

Almost surely, 2^978052147 is an apocalyptic number.

978052147 is a deficient number, since it is larger than the sum of its proper divisors (1).

978052147 is an equidigital number, since it uses as much as digits as its factorization.

978052147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 978052147 is about 31273.8252697044. The cubic root of 978052147 is about 992.6298635344.

The spelling of 978052147 in words is "nine hundred seventy-eight million, fifty-two thousand, one hundred forty-seven".