99479647 has 4 divisors (see below), whose sum is σ = 100464696. Its totient is φ = 98494600.

The previous prime is 99479629. The next prime is 99479741. The reversal of 99479647 is 74697499.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74697499 = 1733 ⋅43103.

It is a cyclic number.

It is not a de Polignac number, because 99479647 - 2⁷ = 99479519 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 (99479147) 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, 492373 + ... + 492574.

It is an arithmetic number, because the mean of its divisors is an integer number (25116174).

Almost surely, 2^99479647 is an apocalyptic number.

99479647 is a deficient number, since it is larger than the sum of its proper divisors (985049).

99479647 is a wasteful number, since it uses less digits than its factorization.

99479647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985048.

The product of its digits is 3429216, while the sum is 55.

The square root of 99479647 is about 9973.9484157479. The cubic root of 99479647 is about 463.3523946520.

The spelling of 99479647 in words is "ninety-nine million, four hundred seventy-nine thousand, six hundred forty-seven".