989472647 has 2 divisors, whose sum is σ = 989472648. Its totient is φ = 989472646.

The previous prime is 989472637. The next prime is 989472689. The reversal of 989472647 is 746274989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989472647 - 2¹⁴ = 989456263 is a prime.

It is a super-2 number, since 2×989472647² = 1958112238322373218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 989472592 and 989472601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989472637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494736323 + 494736324.

It is an arithmetic number, because the mean of its divisors is an integer number (494736324).

Almost surely, 2^989472647 is an apocalyptic number.

989472647 is a deficient number, since it is larger than the sum of its proper divisors (1).

989472647 is an equidigital number, since it uses as much as digits as its factorization.

989472647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 56.

The square root of 989472647 is about 31455.8841395374. The cubic root of 989472647 is about 996.4784958989.

The spelling of 989472647 in words is "nine hundred eighty-nine million, four hundred seventy-two thousand, six hundred forty-seven".