989894767 has 2 divisors, whose sum is σ = 989894768. Its totient is φ = 989894766.

The previous prime is 989894749. The next prime is 989894809. The reversal of 989894767 is 767498989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989894767 - 2⁷ = 989894639 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989894747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494947383 + 494947384.

It is an arithmetic number, because the mean of its divisors is an integer number (494947384).

Almost surely, 2^989894767 is an apocalyptic number.

989894767 is a deficient number, since it is larger than the sum of its proper divisors (1).

989894767 is an equidigital number, since it uses as much as digits as its factorization.

989894767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 67.

The square root of 989894767 is about 31462.5931385193. The cubic root of 989894767 is about 996.6201786773.

The spelling of 989894767 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, seven hundred sixty-seven".