1830747893 has 4 divisors (see below), whose sum is σ = 1971574668. Its totient is φ = 1689921120.

The previous prime is 1830747857. The next prime is 1830747911. The reversal of 1830747893 is 3987470381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3987470381 = 1427 ⋅2794303.

It can be written as a sum of positive squares in 2 ways, for example, as 738643684 + 1092104209 = 27178^2 + 33047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1830747893 - 2⁶ = 1830747829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1830747803) 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, 70413368 + ... + 70413393.

It is an arithmetic number, because the mean of its divisors is an integer number (492893667).

Almost surely, 2^1830747893 is an apocalyptic number.

1830747893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1830747893 is a deficient number, since it is larger than the sum of its proper divisors (140826775).

1830747893 is a wasteful number, since it uses less digits than its factorization.

1830747893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140826774.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 1830747893 is about 42787.2398385313. The cubic root of 1830747893 is about 1223.3278070879.

The spelling of 1830747893 in words is "one billion, eight hundred thirty million, seven hundred forty-seven thousand, eight hundred ninety-three".