978512347 has 2 divisors, whose sum is σ = 978512348. Its totient is φ = 978512346.

The previous prime is 978512263. The next prime is 978512383. The reversal of 978512347 is 743215879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978512347 - 2⁷ = 978512219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978512297 and 978512306.

It is not a weakly prime, because it can be changed into another prime (978518347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489256173 + 489256174.

It is an arithmetic number, because the mean of its divisors is an integer number (489256174).

Almost surely, 2^978512347 is an apocalyptic number.

978512347 is a deficient number, since it is larger than the sum of its proper divisors (1).

978512347 is an equidigital number, since it uses as much as digits as its factorization.

978512347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 978512347 is about 31281.1819949311. The cubic root of 978512347 is about 992.7855255259.

The spelling of 978512347 in words is "nine hundred seventy-eight million, five hundred twelve thousand, three hundred forty-seven".