1813706769 has 32 divisors (see below), whose sum is σ = 2912071680. Its totient is φ = 980888832.

The previous prime is 1813706767. The next prime is 1813706773. The reversal of 1813706769 is 9676073181.

It is a happy number.

It is not a de Polignac number, because 1813706769 - 2¹ = 1813706767 is a prime.

It is a super-2 number, since 2×1813706769² = 6579064487832838722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1813706767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 618184 + ... + 621110.

It is an arithmetic number, because the mean of its divisors is an integer number (91002240).

Almost surely, 2^1813706769 is an apocalyptic number.

1813706769 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1813706769 is a deficient number, since it is larger than the sum of its proper divisors (1098364911).

1813706769 is a wasteful number, since it uses less digits than its factorization.

1813706769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1813706769 is about 42587.6363396702. The cubic root of 1813706769 is about 1219.5202738530.

The spelling of 1813706769 in words is "one billion, eight hundred thirteen million, seven hundred six thousand, seven hundred sixty-nine".