1813007057 has 4 divisors (see below), whose sum is σ = 1814783796. Its totient is φ = 1811230320.

The previous prime is 1813007029. The next prime is 1813007087. The reversal of 1813007057 is 7507003181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7507003181 = 17827 ⋅421103.

It can be written as a sum of positive squares in 2 ways, for example, as 1173473536 + 639533521 = 34256^2 + 25289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1813007057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813007087) 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, 886838 + ... + 888879.

It is an arithmetic number, because the mean of its divisors is an integer number (453695949).

Almost surely, 2^1813007057 is an apocalyptic number.

It is an amenable number.

1813007057 is a deficient number, since it is larger than the sum of its proper divisors (1776739).

1813007057 is a wasteful number, since it uses less digits than its factorization.

1813007057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776738.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 1813007057 is about 42579.4205808393. The cubic root of 1813007057 is about 1219.3634269761.

The spelling of 1813007057 in words is "one billion, eight hundred thirteen million, seven thousand, fifty-seven".