99446989 has 2 divisors, whose sum is σ = 99446990. Its totient is φ = 99446988.

The previous prime is 99446987. The next prime is 99447001. The reversal of 99446989 is 98964499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64931364 + 34515625 = 8058^2 + 5875^2 .

It is a cyclic number.

It is not a de Polignac number, because 99446989 - 2¹ = 99446987 is a prime.

It is a super-2 number, since 2×99446989² = 19779407242332242, which contains 22 as substring.

Together with 99446987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99446981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49723494 + 49723495.

It is an arithmetic number, because the mean of its divisors is an integer number (49723495).

Almost surely, 2^99446989 is an apocalyptic number.

It is an amenable number.

99446989 is a deficient number, since it is larger than the sum of its proper divisors (1).

99446989 is an equidigital number, since it uses as much as digits as its factorization.

99446989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 58.

The square root of 99446989 is about 9972.3111162859. The cubic root of 99446989 is about 463.3016847190.

The spelling of 99446989 in words is "ninety-nine million, four hundred forty-six thousand, nine hundred eighty-nine".