99921974 has 8 divisors (see below), whose sum is σ = 150505608.
Its totient is φ = 49753440.
The previous prime is 99921973. The next prime is 99922001. The reversal of 99921974 is 47912999.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (99921973) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103172 + ... + 104135.
It is an arithmetic number, because the mean of its divisors is an integer number (18813201).
Almost surely, 299921974 is an apocalyptic number.
99921974 is a deficient number, since it is larger than the sum of its proper divisors (50583634).
99921974 is a wasteful number, since it uses less digits than its factorization.
99921974 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 207550.
The product of its digits is 367416, while the sum is 50.
The square root of 99921974 is about 9996.0979386959.
The cubic root of 99921974 is about 464.0381304128.
The spelling of 99921974 in words is "ninety-nine million, nine hundred twenty-one thousand, nine hundred seventy-four".