99478775 has 48 divisors (see below), whose sum is σ = 144038400. Its totient is φ = 67392000.

The previous prime is 99478763. The next prime is 99478793. The reversal of 99478775 is 57787499.

99478775 = T₃₉₅ + T₃₉₆ + ... + T₈₆₉.

It is not a de Polignac number, because 99478775 - 2¹² = 99474679 is a prime.

It is a super-3 number, since 3×99478775³ (a number of 25 digits) contains 333 as substring.

Its product of digits (4445280) is a multiple of the sum of its prime factors (360).

It is a self number, because there is not a number n which added to its sum of digits gives 99478775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 412655 + ... + 412895.

It is an arithmetic number, because the mean of its divisors is an integer number (3000800).

Almost surely, 2^99478775 is an apocalyptic number.

99478775 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99478775 is a deficient number, since it is larger than the sum of its proper divisors (44559625).

99478775 is a wasteful number, since it uses less digits than its factorization.

99478775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 355 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 56.

The square root of 99478775 is about 9973.9047017705. The cubic root of 99478775 is about 463.3510407922.

It can be divided in two parts, 99 and 478775, that added together give a palindrome (478874).

The spelling of 99478775 in words is "ninety-nine million, four hundred seventy-eight thousand, seven hundred seventy-five".