204156769 has 4 divisors (see below), whose sum is σ = 204379840. Its totient is φ = 203933700.

The previous prime is 204156727. The next prime is 204156779. The reversal of 204156769 is 967651402.

204156769 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 967651402 = 2 ⋅483825701.

It is a cyclic number.

It is not a de Polignac number, because 204156769 - 2¹⁵ = 204124001 is a prime.

It is a super-2 number, since 2×204156769² = 83359972657038722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204156779) 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, 110157 + ... + 111994.

It is an arithmetic number, because the mean of its divisors is an integer number (51094960).

Almost surely, 2^204156769 is an apocalyptic number.

It is an amenable number.

204156769 is a deficient number, since it is larger than the sum of its proper divisors (223071).

204156769 is an equidigital number, since it uses as much as digits as its factorization.

204156769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223070.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 204156769 is about 14288.3438158521. The cubic root of 204156769 is about 588.8272875729.

The spelling of 204156769 in words is "two hundred four million, one hundred fifty-six thousand, seven hundred sixty-nine".