99999477 has 6 divisors (see below), whose sum is σ = 144443702. Its totient is φ = 66666312.

The previous prime is 99999439. The next prime is 99999481. The reversal of 99999477 is 77499999.

It can be written as a sum of positive squares in only one way, i.e., 83887281 + 16112196 = 9159^2 + 4014^2 .

It is not a de Polignac number, because 99999477 - 2¹⁸ = 99737333 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 (99999437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5555518 + ... + 5555535.

Almost surely, 2^99999477 is an apocalyptic number.

It is an amenable number.

99999477 is a deficient number, since it is larger than the sum of its proper divisors (44444225).

99999477 is a wasteful number, since it uses less digits than its factorization.

99999477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111059 (or 11111056 counting only the distinct ones).

The product of its digits is 11573604, while the sum is 63.

The square root of 99999477 is about 9999.9738499658. The cubic root of 99999477 is about 464.1580741762.

The spelling of 99999477 in words is "ninety-nine million, nine hundred ninety-nine thousand, four hundred seventy-seven".