205978119 has 4 divisors (see below), whose sum is σ = 274637496. Its totient is φ = 137318744.

The previous prime is 205978109. The next prime is 205978139. The reversal of 205978119 is 911879502.

205978119 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 205978119 - 2⁷ = 205977991 is a prime.

It is a super-2 number, since 2×205978119² = 84853971013556322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205978109) 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, 34329684 + ... + 34329689.

It is an arithmetic number, because the mean of its divisors is an integer number (68659374).

Almost surely, 2^205978119 is an apocalyptic number.

205978119 is a deficient number, since it is larger than the sum of its proper divisors (68659377).

205978119 is an equidigital number, since it uses as much as digits as its factorization.

205978119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68659376.

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 205978119 is about 14351.9378134104. The cubic root of 205978119 is about 590.5731469609.

The spelling of 205978119 in words is "two hundred five million, nine hundred seventy-eight thousand, one hundred nineteen".