99997974 has 48 divisors (see below), whose sum is σ = 233906400. Its totient is φ = 30780288.

The previous prime is 99997973. The next prime is 99997981. The reversal of 99997974 is 47979999.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99997973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7842 + ... + 16170.

It is an arithmetic number, because the mean of its divisors is an integer number (4873050).

Almost surely, 2^99997974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99997974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116953200).

99997974 is an abundant number, since it is smaller than the sum of its proper divisors (133908426).

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

99997974 is a wasteful number, since it uses less digits than its factorization.

99997974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8389 (or 8386 counting only the distinct ones).

The product of its digits is 11573604, while the sum is 63.

The square root of 99997974 is about 9999.8986994869. The cubic root of 99997974 is about 464.1557487204.

The spelling of 99997974 in words is "ninety-nine million, nine hundred ninety-seven thousand, nine hundred seventy-four".