99979554 has 8 divisors (see below), whose sum is σ = 199959120. Its totient is φ = 33326516.

The previous prime is 99979553. The next prime is 99979591. The reversal of 99979554 is 45597999.

It is a sphenic number, since it is the product of 3 distinct primes.

99979554 is an admirable number.

It is a super-2 number, since 2×99979554² = 19991822436077832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99979494 and 99979503.

It is not an unprimeable number, because it can be changed into a prime (99979553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8331624 + ... + 8331635.

It is an arithmetic number, because the mean of its divisors is an integer number (24994890).

Almost surely, 2^99979554 is an apocalyptic number.

99979554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99979554 is a wasteful number, since it uses less digits than its factorization.

99979554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16663264.

The product of its digits is 4592700, while the sum is 57.

The square root of 99979554 is about 9998.9776477398. The cubic root of 99979554 is about 464.1272472300.

The spelling of 99979554 in words is "ninety-nine million, nine hundred seventy-nine thousand, five hundred fifty-four".