1805042469 has 4 divisors (see below), whose sum is σ = 2406723296. Its totient is φ = 1203361644.

The previous prime is 1805042467. The next prime is 1805042489. The reversal of 1805042469 is 9642405081.

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: 9642405081 = 3 ⋅3214135027.

It is not a de Polignac number, because 1805042469 - 2¹ = 1805042467 is a prime.

It is a super-2 number, since 2×1805042469² = 6516356629787231922, 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 (1805042467) 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, 300840409 + ... + 300840414.

It is an arithmetic number, because the mean of its divisors is an integer number (601680824).

Almost surely, 2^1805042469 is an apocalyptic number.

It is an amenable number.

1805042469 is a deficient number, since it is larger than the sum of its proper divisors (601680827).

1805042469 is an equidigital number, since it uses as much as digits as its factorization.

1805042469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601680826.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1805042469 is about 42485.7913778242. The cubic root of 1805042469 is about 1217.5752406253.

The spelling of 1805042469 in words is "one billion, eight hundred five million, forty-two thousand, four hundred sixty-nine".