1357295809 has 4 divisors (see below), whose sum is σ = 1357573716. Its totient is φ = 1357017904.

The previous prime is 1357295791. The next prime is 1357295839. The reversal of 1357295809 is 9085927531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 660335809 + 696960000 = 25697^2 + 26400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1357295809 - 2¹⁵ = 1357263041 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1357295839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131494 + ... + 141439.

It is an arithmetic number, because the mean of its divisors is an integer number (339393429).

Almost surely, 2^1357295809 is an apocalyptic number.

It is an amenable number.

1357295809 is a deficient number, since it is larger than the sum of its proper divisors (277907).

1357295809 is an equidigital number, since it uses as much as digits as its factorization.

1357295809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277906.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 1357295809 is about 36841.4957486799. The cubic root of 1357295809 is about 1107.1968359685.

The spelling of 1357295809 in words is "one billion, three hundred fifty-seven million, two hundred ninety-five thousand, eight hundred nine".