13809757 has 8 divisors (see below), whose sum is σ = 14956760. Its totient is φ = 12674880.

The previous prime is 13809749. The next prime is 13809773. The reversal of 13809757 is 75790831.

It can be written as a sum of positive squares in 4 ways, for example, as 1879641 + 11930116 = 1371^2 + 3454^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13809757 - 2³ = 13809749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809707) 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 7 ways as a sum of consecutive naturals, for example, 582 + ... + 5287.

It is an arithmetic number, because the mean of its divisors is an integer number (1869595).

Almost surely, 2^13809757 is an apocalyptic number.

It is an amenable number.

13809757 is a deficient number, since it is larger than the sum of its proper divisors (1147003).

13809757 is a wasteful number, since it uses less digits than its factorization.

13809757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6063.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 13809757 is about 3716.1481402119. The cubic root of 13809757 is about 239.9175469076.

The spelling of 13809757 in words is "thirteen million, eight hundred nine thousand, seven hundred fifty-seven".