205940413 has 8 divisors (see below), whose sum is σ = 245593728. Its totient is φ = 168845424.

The previous prime is 205940407. The next prime is 205940447. The reversal of 205940413 is 314049502.

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

It is a cyclic number.

It is not a de Polignac number, because 205940413 - 2²¹ = 203843261 is a prime.

It is a super-2 number, since 2×205940413² = 84822907413221138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205940473) 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, 639406 + ... + 639727.

It is an arithmetic number, because the mean of its divisors is an integer number (30699216).

Almost surely, 2^205940413 is an apocalyptic number.

205940413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

205940413 is a deficient number, since it is larger than the sum of its proper divisors (39653315).

205940413 is a wasteful number, since it uses less digits than its factorization.

205940413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279163.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 205940413 is about 14350.6241327686. The cubic root of 205940413 is about 590.5371083271.

Adding to 205940413 its reverse (314049502), we get a palindrome (519989915).

The spelling of 205940413 in words is "two hundred five million, nine hundred forty thousand, four hundred thirteen".