1012004639 has 4 divisors (see below), whose sum is σ = 1029157320. Its totient is φ = 994851960.

The previous prime is 1012004633. The next prime is 1012004647. The reversal of 1012004639 is 9364002101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9364002101 = 17 ⋅550823653.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012004639 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 (1012004633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8576252 + ... + 8576369.

It is an arithmetic number, because the mean of its divisors is an integer number (257289330).

Almost surely, 2^1012004639 is an apocalyptic number.

1012004639 is a deficient number, since it is larger than the sum of its proper divisors (17152681).

1012004639 is an equidigital number, since it uses as much as digits as its factorization.

1012004639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17152680.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1012004639 is about 31812.0203539480. The cubic root of 1012004639 is about 1003.9856399035.

The spelling of 1012004639 in words is "one billion, twelve million, four thousand, six hundred thirty-nine".