13759861 has 6 divisors (see below), whose sum is σ = 14061110. Its totient is φ = 13464936.

The previous prime is 13759853. The next prime is 13759903. The reversal of 13759861 is 16895731.

It can be written as a sum of positive squares in only one way, i.e., 11771761 + 1988100 = 3431^2 + 1410^2 .

It is not a de Polignac number, because 13759861 - 2³ = 13759853 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 (13759661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 906 + ... + 5323.

Almost surely, 2^13759861 is an apocalyptic number.

It is an amenable number.

13759861 is a deficient number, since it is larger than the sum of its proper divisors (301249).

13759861 is an frugal number, since it uses more digits than its factorization.

13759861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323 (or 6276 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 13759861 is about 3709.4286622066. The cubic root of 13759861 is about 239.6282497026.

It can be divided in two parts, 1375 and 9861, that added together give a square (11236 = 106²).

The spelling of 13759861 in words is "thirteen million, seven hundred fifty-nine thousand, eight hundred sixty-one".