13798781 has 8 divisors (see below), whose sum is σ = 15246144. Its totient is φ = 12422080.

The previous prime is 13798753. The next prime is 13798787. The reversal of 13798781 is 18789731.

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 13798781 - 2¹⁴ = 13782397 is a prime.

It is a super-2 number, since 2×13798781² = 380812714171922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13798787) 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, 17255 + ... + 18036.

It is an arithmetic number, because the mean of its divisors is an integer number (1905768).

Almost surely, 2^13798781 is an apocalyptic number.

It is an amenable number.

13798781 is a deficient number, since it is larger than the sum of its proper divisors (1447363).

13798781 is a wasteful number, since it uses less digits than its factorization.

13798781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35331.

The product of its digits is 84672, while the sum is 44.

The square root of 13798781 is about 3714.6710486933. The cubic root of 13798781 is about 239.8539678752.

The spelling of 13798781 in words is "thirteen million, seven hundred ninety-eight thousand, seven hundred eighty-one".