98911989 has 32 divisors (see below), whose sum is σ = 164196480. Its totient is φ = 58320000.

The previous prime is 98911973. The next prime is 98912087.

98911989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 98911989 - 2⁴ = 98911973 is a prime.

It is a super-2 number, since 2×98911989² = 19567163135872242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98911909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6489 + ... + 15489.

It is an arithmetic number, because the mean of its divisors is an integer number (5131140).

Almost surely, 2^98911989 is an apocalyptic number.

98911989 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

98911989 is a deficient number, since it is larger than the sum of its proper divisors (65284491).

98911989 is a wasteful number, since it uses less digits than its factorization.

98911989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9058 (or 9052 counting only the distinct ones).

The product of its digits is 419904, while the sum is 54.

The square root of 98911989 is about 9945.4506685218. The cubic root of 98911989 is about 462.4693745487.

The spelling of 98911989 in words is "ninety-eight million, nine hundred eleven thousand, nine hundred eighty-nine".