99988426 has 4 divisors (see below), whose sum is σ = 149982642. Its totient is φ = 49994212.

The previous prime is 99988409. The next prime is 99988453. The reversal of 99988426 is 62488999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62488999 = 23 ⋅2716913.

It can be written as a sum of positive squares in only one way, i.e., 71419401 + 28569025 = 8451^2 + 5345^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24997105 + ... + 24997108.

Almost surely, 2^99988426 is an apocalyptic number.

99988426 is a deficient number, since it is larger than the sum of its proper divisors (49994216).

99988426 is a wasteful number, since it uses less digits than its factorization.

99988426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49994215.

The product of its digits is 2239488, while the sum is 55.

The square root of 99988426 is about 9999.4212832543. The cubic root of 99988426 is about 464.1409754207.

The spelling of 99988426 in words is "ninety-nine million, nine hundred eighty-eight thousand, four hundred twenty-six".