99775399 has 8 divisors (see below), whose sum is σ = 103363920. Its totient is φ = 96311320.

The previous prime is 99775393. The next prime is 99775463. The reversal of 99775399 is 99357799.

It is a de Polignac number, because none of the positive numbers 2^k-99775399 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 (99775393) 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 7 ways as a sum of consecutive naturals, for example, 22344 + ... + 26434.

It is an arithmetic number, because the mean of its divisors is an integer number (12920490).

Almost surely, 2^99775399 is an apocalyptic number.

99775399 is a deficient number, since it is larger than the sum of its proper divisors (3588521).

99775399 is an frugal number, since it uses more digits than its factorization.

99775399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178 (or 4120 counting only the distinct ones).

The product of its digits is 4822335, while the sum is 58.

The square root of 99775399 is about 9988.7636372076. The cubic root of 99775399 is about 463.8111210408.

It can be divided in two parts, 9977 and 5399, that added together give a square (15376 = 124²).

The spelling of 99775399 in words is "ninety-nine million, seven hundred seventy-five thousand, three hundred ninety-nine".