99997355 has 4 divisors (see below), whose sum is σ = 119996832. Its totient is φ = 79997880.

The previous prime is 99997267. The next prime is 99997357. The reversal of 99997355 is 55379999.

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

It is not a de Polignac number, because 99997355 - 2¹⁸ = 99735211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99997355.

It is not an unprimeable number, because it can be changed into a prime (99997357) 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, 9999731 + ... + 9999740.

It is an arithmetic number, because the mean of its divisors is an integer number (29999208).

Almost surely, 2^99997355 is an apocalyptic number.

99997355 is a deficient number, since it is larger than the sum of its proper divisors (19999477).

99997355 is a wasteful number, since it uses less digits than its factorization.

99997355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19999476.

The product of its digits is 3444525, while the sum is 56.

The square root of 99997355 is about 9999.8677491255. The cubic root of 99997355 is about 464.1547909910.

The spelling of 99997355 in words is "ninety-nine million, nine hundred ninety-seven thousand, three hundred fifty-five".