13770143 has 4 divisors (see below), whose sum is σ = 13861488. Its totient is φ = 13678800.

The previous prime is 13770131. The next prime is 13770149. The reversal of 13770143 is 34107731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34107731 = 7 ⋅4872533.

It is a cyclic number.

It is not a de Polignac number, because 13770143 - 2⁸ = 13769887 is a prime.

It is a super-3 number, since 3×13770143³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13770149) 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, 45446 + ... + 45747.

It is an arithmetic number, because the mean of its divisors is an integer number (3465372).

Almost surely, 2^13770143 is an apocalyptic number.

13770143 is a deficient number, since it is larger than the sum of its proper divisors (91345).

13770143 is an equidigital number, since it uses as much as digits as its factorization.

13770143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91344.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 13770143 is about 3710.8143311139. The cubic root of 13770143 is about 239.6879219192.

Adding to 13770143 its reverse (34107731), we get a palindrome (47877874).

The spelling of 13770143 in words is "thirteen million, seven hundred seventy thousand, one hundred forty-three".