989896387 has 2 divisors, whose sum is σ = 989896388. Its totient is φ = 989896386.

The previous prime is 989896363. The next prime is 989896393. The reversal of 989896387 is 783698989.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989896387 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (989896337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494948193 + 494948194.

It is an arithmetic number, because the mean of its divisors is an integer number (494948194).

Almost surely, 2^989896387 is an apocalyptic number.

989896387 is a deficient number, since it is larger than the sum of its proper divisors (1).

989896387 is an equidigital number, since it uses as much as digits as its factorization.

989896387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 67.

The square root of 989896387 is about 31462.6188833670. The cubic root of 989896387 is about 996.6207223458.

The spelling of 989896387 in words is "nine hundred eighty-nine million, eight hundred ninety-six thousand, three hundred eighty-seven".