1040209613 has 8 divisors (see below), whose sum is σ = 1077255480. Its totient is φ = 1003242240.

The previous prime is 1040209609. The next prime is 1040209649. The reversal of 1040209613 is 3169020401.

It can be written as a sum of positive squares in 4 ways, for example, as 187744804 + 852464809 = 13702^2 + 29197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1040209613 - 2² = 1040209609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040209673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8033 + ... + 46313.

It is an arithmetic number, because the mean of its divisors is an integer number (134656935).

Almost surely, 2^1040209613 is an apocalyptic number.

It is an amenable number.

1040209613 is a deficient number, since it is larger than the sum of its proper divisors (37045867).

1040209613 is an equidigital number, since it uses as much as digits as its factorization.

1040209613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39247.

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

The square root of 1040209613 is about 32252.2807410577. The cubic root of 1040209613 is about 1013.2274669983.

The spelling of 1040209613 in words is "one billion, forty million, two hundred nine thousand, six hundred thirteen".