205154993 has 8 divisors (see below), whose sum is σ = 212948736. Its totient is φ = 197434800.

The previous prime is 205154987. The next prime is 205155011. The reversal of 205154993 is 399451502.

205154993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205154993 - 2¹⁰ = 205153969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205154923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12671 + ... + 23892.

It is an arithmetic number, because the mean of its divisors is an integer number (26618592).

Almost surely, 2^205154993 is an apocalyptic number.

It is an amenable number.

205154993 is a deficient number, since it is larger than the sum of its proper divisors (7793743).

205154993 is a wasteful number, since it uses less digits than its factorization.

205154993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36775.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 205154993 is about 14323.2326309391. The cubic root of 205154993 is about 589.7854175133.

The spelling of 205154993 in words is "two hundred five million, one hundred fifty-four thousand, nine hundred ninety-three".