2154356999 has 4 divisors (see below), whose sum is σ = 2159982336. Its totient is φ = 2148731664.

The previous prime is 2154356993. The next prime is 2154357019. The reversal of 2154356999 is 9996534512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154356999 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 2154356999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154356993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2812094 + ... + 2812859.

It is an arithmetic number, because the mean of its divisors is an integer number (539995584).

Almost surely, 2^2154356999 is an apocalyptic number.

2154356999 is a deficient number, since it is larger than the sum of its proper divisors (5625337).

2154356999 is an equidigital number, since it uses as much as digits as its factorization.

2154356999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625336.

The product of its digits is 2624400, while the sum is 53.

The square root of 2154356999 is about 46415.0514273118. The cubic root of 2154356999 is about 1291.5341399783.

The spelling of 2154356999 in words is "two billion, one hundred fifty-four million, three hundred fifty-six thousand, nine hundred ninety-nine".