1004012893 has 4 divisors (see below), whose sum is σ = 1081244668. Its totient is φ = 926781120.

The previous prime is 1004012887. The next prime is 1004012897. The reversal of 1004012893 is 3982104001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3982104001 = 313 ⋅12722377.

It can be written as a sum of positive squares in 2 ways, for example, as 632371609 + 371641284 = 25147^2 + 19278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004012893 - 2²¹ = 1001915741 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 (1004012897) 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, 38615868 + ... + 38615893.

It is an arithmetic number, because the mean of its divisors is an integer number (270311167).

Almost surely, 2^1004012893 is an apocalyptic number.

1004012893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1004012893 is a deficient number, since it is larger than the sum of its proper divisors (77231775).

1004012893 is an equidigital number, since it uses as much as digits as its factorization.

1004012893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77231774.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1004012893 is about 31686.1624845925. The cubic root of 1004012893 is about 1001.3358457216.

Adding to 1004012893 its reverse (3982104001), we get a palindrome (4986116894).

The spelling of 1004012893 in words is "one billion, four million, twelve thousand, eight hundred ninety-three".