99997219 has 8 divisors (see below), whose sum is σ = 114346080. Its totient is φ = 85664256.

The previous prime is 99997189. The next prime is 99997243. The reversal of 99997219 is 91279999.

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

It is a cyclic number.

It is not a de Polignac number, because 99997219 - 2⁵ = 99997187 is a prime.

It is a super-2 number, since 2×99997219² = 19998887615467922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99997219.

It is not an unprimeable number, because it can be changed into a prime (99997619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16677 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (14293260).

Almost surely, 2^99997219 is an apocalyptic number.

99997219 is a deficient number, since it is larger than the sum of its proper divisors (14348861).

99997219 is a wasteful number, since it uses less digits than its factorization.

99997219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7949.

The product of its digits is 826686, while the sum is 55.

The square root of 99997219 is about 9999.8609490332. The cubic root of 99997219 is about 464.1545805685.

The spelling of 99997219 in words is "ninety-nine million, nine hundred ninety-seven thousand, two hundred nineteen".