99919487 has 8 divisors (see below), whose sum is σ = 102692304. Its totient is φ = 97167168.

The previous prime is 99919483. The next prime is 99919511. The reversal of 99919487 is 78491999.

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 99919487 - 2² = 99919483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99919483) 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, 5033 + ... + 15005.

It is an arithmetic number, because the mean of its divisors is an integer number (12836538).

Almost surely, 2^99919487 is an apocalyptic number.

99919487 is a deficient number, since it is larger than the sum of its proper divisors (2772817).

99919487 is a wasteful number, since it uses less digits than its factorization.

99919487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10249.

The product of its digits is 1469664, while the sum is 56.

The square root of 99919487 is about 9995.9735393807. The cubic root of 99919487 is about 464.0342805009.

The spelling of 99919487 in words is "ninety-nine million, nine hundred nineteen thousand, four hundred eighty-seven".