1009404739 has 4 divisors (see below), whose sum is σ = 1153605424. Its totient is φ = 865204056.

The previous prime is 1009404719. The next prime is 1009404743. The reversal of 1009404739 is 9374049001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1009404739 - 2¹³ = 1009396547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1009404698 and 1009404707.

It is not an unprimeable number, because it can be changed into a prime (1009404709) 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, 72100332 + ... + 72100345.

It is an arithmetic number, because the mean of its divisors is an integer number (288401356).

Almost surely, 2^1009404739 is an apocalyptic number.

1009404739 is a deficient number, since it is larger than the sum of its proper divisors (144200685).

1009404739 is an equidigital number, since it uses as much as digits as its factorization.

1009404739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144200684.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1009404739 is about 31771.1305905220. The cubic root of 1009404739 is about 1003.1251363489.

The spelling of 1009404739 in words is "one billion, nine million, four hundred four thousand, seven hundred thirty-nine".