99425639 has 4 divisors (see below), whose sum is σ = 105274224. Its totient is φ = 93577056.

The previous prime is 99425611. The next prime is 99425647. The reversal of 99425639 is 93652499.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99425639 - 2⁸ = 99425383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99425593 and 99425602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99425699) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2924267 + ... + 2924300.

It is an arithmetic number, because the mean of its divisors is an integer number (26318556).

Almost surely, 2^99425639 is an apocalyptic number.

99425639 is a deficient number, since it is larger than the sum of its proper divisors (5848585).

99425639 is a wasteful number, since it uses less digits than its factorization.

99425639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848584.

The product of its digits is 524880, while the sum is 47.

The square root of 99425639 is about 9971.2405948307. The cubic root of 99425639 is about 463.2685273587.

The spelling of 99425639 in words is "ninety-nine million, four hundred twenty-five thousand, six hundred thirty-nine".