99997976 has 48 divisors (see below), whose sum is σ = 208620000. Its totient is φ = 44883072.

The previous prime is 99997973. The next prime is 99997981. The reversal of 99997976 is 67979999.

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 11 ways as a sum of consecutive naturals, for example, 49025 + ... + 51023.

It is an arithmetic number, because the mean of its divisors is an integer number (4346250).

Almost surely, 2^99997976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99997976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104310000).

99997976 is an abundant number, since it is smaller than the sum of its proper divisors (108622024).

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

99997976 is a wasteful number, since it uses less digits than its factorization.

99997976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2051 counting only the distinct ones).

The product of its digits is 17360406, while the sum is 65.

The square root of 99997976 is about 9999.8987994879. The cubic root of 99997976 is about 464.1557518149.

The spelling of 99997976 in words is "ninety-nine million, nine hundred ninety-seven thousand, nine hundred seventy-six".