99997619 has 2 divisors, whose sum is σ = 99997620. Its totient is φ = 99997618.

The previous prime is 99997609. The next prime is 99997649. The reversal of 99997619 is 91679999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99997619 is a prime.

It is a super-2 number, since 2×99997619² = 19999047611338322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99997609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49998809 + 49998810.

It is an arithmetic number, because the mean of its divisors is an integer number (49998810).

Almost surely, 2^99997619 is an apocalyptic number.

99997619 is a deficient number, since it is larger than the sum of its proper divisors (1).

99997619 is an equidigital number, since it uses as much as digits as its factorization.

99997619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2480058, while the sum is 59.

The square root of 99997619 is about 9999.8809492913. The cubic root of 99997619 is about 464.1551994577.

The spelling of 99997619 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred nineteen".