99111023 has 16 divisors (see below), whose sum is σ = 111041280. Its totient is φ = 87700800.

The previous prime is 99111017. The next prime is 99111053. The reversal of 99111023 is 32011199.

99111023 = 2112² + 2113² + ... + 2133².

It is not a de Polignac number, because 99111023 - 2¹² = 99106927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99110983 and 99111001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99111013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64838 + ... + 66348.

It is an arithmetic number, because the mean of its divisors is an integer number (6940080).

Almost surely, 2^99111023 is an apocalyptic number.

99111023 is a deficient number, since it is larger than the sum of its proper divisors (11930257).

99111023 is a wasteful number, since it uses less digits than its factorization.

99111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 99111023 is about 9955.4519234438. The cubic root of 99111023 is about 462.7793654785.

The spelling of 99111023 in words is "ninety-nine million, one hundred eleven thousand, twenty-three".