99419621 has 8 divisors (see below), whose sum is σ = 120306240. Its totient is φ = 80203968.

The previous prime is 99419599. The next prime is 99419669. The reversal of 99419621 is 12691499.

It is a happy number.

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 99419621 - 2¹⁸ = 99157477 is a prime.

It is a super-2 number, since 2×99419621² = 19768522079567282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99419521) 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, 417611 + ... + 417848.

It is an arithmetic number, because the mean of its divisors is an integer number (15038280).

Almost surely, 2^99419621 is an apocalyptic number.

It is an amenable number.

99419621 is a deficient number, since it is larger than the sum of its proper divisors (20886619).

99419621 is a wasteful number, since it uses less digits than its factorization.

99419621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835483.

The product of its digits is 34992, while the sum is 41.

The square root of 99419621 is about 9970.9388223978. The cubic root of 99419621 is about 463.2591803188.

The spelling of 99419621 in words is "ninety-nine million, four hundred nineteen thousand, six hundred twenty-one".