204142649 has 8 divisors (see below), whose sum is σ = 209707008. Its totient is φ = 198606240.

The previous prime is 204142639. The next prime is 204142663. The reversal of 204142649 is 946241402.

204142649 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 a cyclic number.

It is not a de Polignac number, because 204142649 - 2⁴ = 204142633 is a prime.

It is a super-2 number, since 2×204142649² = 83348442281474402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204142619) 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, 8264 + ... + 21830.

It is an arithmetic number, because the mean of its divisors is an integer number (26213376).

Almost surely, 2^204142649 is an apocalyptic number.

It is an amenable number.

204142649 is a deficient number, since it is larger than the sum of its proper divisors (5564359).

204142649 is a wasteful number, since it uses less digits than its factorization.

204142649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13975.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 204142649 is about 14287.8496982576. The cubic root of 204142649 is about 588.8137123304.

The spelling of 204142649 in words is "two hundred four million, one hundred forty-two thousand, six hundred forty-nine".