978631047 has 6 divisors (see below), whose sum is σ = 1413578192. Its totient is φ = 652420692.

The previous prime is 978631007. The next prime is 978631057. The reversal of 978631047 is 740136879.

978631047 is a `hidden beast` number, since 9 + 7 + 8 + 631 + 0 + 4 + 7 = 666.

It is not a de Polignac number, because 978631047 - 2⁸ = 978630791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978630993 and 978631011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978631007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54368383 + ... + 54368400.

Almost surely, 2^978631047 is an apocalyptic number.

978631047 is a deficient number, since it is larger than the sum of its proper divisors (434947145).

978631047 is a wasteful number, since it uses less digits than its factorization.

978631047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108736789 (or 108736786 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 978631047 is about 31283.0792442176. The cubic root of 978631047 is about 992.8256677130.

It can be divided in two parts, 978 and 631047, that added together give a square (632025 = 795²).

The spelling of 978631047 in words is "nine hundred seventy-eight million, six hundred thirty-one thousand, forty-seven".