99958557 has 16 divisors (see below), whose sum is σ = 136384128. Its totient is φ = 65103360.

The previous prime is 99958553. The next prime is 99958561. The reversal of 99958557 is 75585999.

It is an interprime number because it is at equal distance from previous prime (99958553) and next prime (99958561).

It is not a de Polignac number, because 99958557 - 2² = 99958553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99958497 and 99958506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99958553) 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, 21993 + ... + 26145.

It is an arithmetic number, because the mean of its divisors is an integer number (8524008).

Almost surely, 2^99958557 is an apocalyptic number.

It is an amenable number.

99958557 is a deficient number, since it is larger than the sum of its proper divisors (36425571).

99958557 is a wasteful number, since it uses less digits than its factorization.

99958557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340.

The product of its digits is 5103000, while the sum is 57.

The square root of 99958557 is about 9997.9276352652. The cubic root of 99958557 is about 464.0947540461.

The spelling of 99958557 in words is "ninety-nine million, nine hundred fifty-eight thousand, five hundred fifty-seven".