989930651 has 2 divisors, whose sum is σ = 989930652. Its totient is φ = 989930650.

The previous prime is 989930629. The next prime is 989930663. The reversal of 989930651 is 156039989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989930651 - 2¹⁸ = 989668507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 989930651.

It is not a weakly prime, because it can be changed into another prime (989930251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494965325 + 494965326.

It is an arithmetic number, because the mean of its divisors is an integer number (494965326).

Almost surely, 2^989930651 is an apocalyptic number.

989930651 is a deficient number, since it is larger than the sum of its proper divisors (1).

989930651 is an equidigital number, since it uses as much as digits as its factorization.

989930651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 989930651 is about 31463.1633978531. The cubic root of 989930651 is about 996.6322211312.

The spelling of 989930651 in words is "nine hundred eighty-nine million, nine hundred thirty thousand, six hundred fifty-one".