99858958 has 4 divisors (see below), whose sum is σ = 149788440. Its totient is φ = 49929478.

The previous prime is 99858949. The next prime is 99858959. The reversal of 99858958 is 85985899.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×99858958² = 19943622985691528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99858896 and 99858905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99858959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24964738 + ... + 24964741.

It is an arithmetic number, because the mean of its divisors is an integer number (37447110).

Almost surely, 2^99858958 is an apocalyptic number.

99858958 is a deficient number, since it is larger than the sum of its proper divisors (49929482).

99858958 is a wasteful number, since it uses less digits than its factorization.

99858958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49929481.

The product of its digits is 9331200, while the sum is 61.

The square root of 99858958 is about 9992.9454116392. The cubic root of 99858958 is about 463.9405610296.

The spelling of 99858958 in words is "ninety-nine million, eight hundred fifty-eight thousand, nine hundred fifty-eight".