989650447 has 2 divisors, whose sum is σ = 989650448. Its totient is φ = 989650446.

The previous prime is 989650423. The next prime is 989650477. The reversal of 989650447 is 744056989.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989650447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989650394 and 989650403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989650477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494825223 + 494825224.

It is an arithmetic number, because the mean of its divisors is an integer number (494825224).

Almost surely, 2^989650447 is an apocalyptic number.

989650447 is a deficient number, since it is larger than the sum of its proper divisors (1).

989650447 is an equidigital number, since it uses as much as digits as its factorization.

989650447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 989650447 is about 31458.7101928862. The cubic root of 989650447 is about 996.5381786218.

The spelling of 989650447 in words is "nine hundred eighty-nine million, six hundred fifty thousand, four hundred forty-seven".