989225947 has 2 divisors, whose sum is σ = 989225948. Its totient is φ = 989225946.

The previous prime is 989225927. The next prime is 989225953. The reversal of 989225947 is 749522989.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989225947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (989225927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494612973 + 494612974.

It is an arithmetic number, because the mean of its divisors is an integer number (494612974).

Almost surely, 2^989225947 is an apocalyptic number.

989225947 is a deficient number, since it is larger than the sum of its proper divisors (1).

989225947 is an equidigital number, since it uses as much as digits as its factorization.

989225947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The square root of 989225947 is about 31451.9625301824. The cubic root of 989225947 is about 996.3956734382.

The spelling of 989225947 in words is "nine hundred eighty-nine million, two hundred twenty-five thousand, nine hundred forty-seven".