99988437 has 4 divisors (see below), whose sum is σ = 133317920. Its totient is φ = 66658956.

The previous prime is 99988409. The next prime is 99988453. The reversal of 99988437 is 73488999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 99988437 - 2¹⁹ = 99464149 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 (99988477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16664737 + ... + 16664742.

It is an arithmetic number, because the mean of its divisors is an integer number (33329480).

Almost surely, 2^99988437 is an apocalyptic number.

It is an amenable number.

99988437 is a deficient number, since it is larger than the sum of its proper divisors (33329483).

99988437 is a wasteful number, since it uses less digits than its factorization.

99988437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33329482.

The product of its digits is 3919104, while the sum is 57.

The square root of 99988437 is about 9999.4218332862. The cubic root of 99988437 is about 464.1409924411.

The spelling of 99988437 in words is "ninety-nine million, nine hundred eighty-eight thousand, four hundred thirty-seven".