13780101 has 4 divisors (see below), whose sum is σ = 18373472. Its totient is φ = 9186732.

The previous prime is 13780097. The next prime is 13780103. The reversal of 13780101 is 10108731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10108731 = 3 ⋅3369577.

It is not a de Polignac number, because 13780101 - 2² = 13780097 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 (13780103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2296681 + ... + 2296686.

It is an arithmetic number, because the mean of its divisors is an integer number (4593368).

Almost surely, 2^13780101 is an apocalyptic number.

It is an amenable number.

13780101 is a deficient number, since it is larger than the sum of its proper divisors (4593371).

13780101 is an equidigital number, since it uses as much as digits as its factorization.

13780101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4593370.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 13780101 is about 3712.1558426338. The cubic root of 13780101 is about 239.7456854735.

Adding to 13780101 its reverse (10108731), we get a palindrome (23888832).

The spelling of 13780101 in words is "thirteen million, seven hundred eighty thousand, one hundred one".