989472637 has 2 divisors, whose sum is σ = 989472638. Its totient is φ = 989472636.

The previous prime is 989472559. The next prime is 989472647. The reversal of 989472637 is 736274989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 961372036 + 28100601 = 31006^2 + 5301^2 .

It is a cyclic number.

It is not a de Polignac number, because 989472637 - 2⁷ = 989472509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989472647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494736318 + 494736319.

It is an arithmetic number, because the mean of its divisors is an integer number (494736319).

Almost surely, 2^989472637 is an apocalyptic number.

It is an amenable number.

989472637 is a deficient number, since it is larger than the sum of its proper divisors (1).

989472637 is an equidigital number, since it uses as much as digits as its factorization.

989472637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 55.

The square root of 989472637 is about 31455.8839805846. The cubic root of 989472637 is about 996.4784925420.

The spelling of 989472637 in words is "nine hundred eighty-nine million, four hundred seventy-two thousand, six hundred thirty-seven".