13771970 has 32 divisors (see below), whose sum is σ = 25551936. Its totient is φ = 5342400.

The previous prime is 13771943. The next prime is 13771973. The reversal of 13771970 is 7917731.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13771970.

It is not an unprimeable number, because it can be changed into a prime (13771973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65165 + ... + 65375.

It is an arithmetic number, because the mean of its divisors is an integer number (798498).

Almost surely, 2^13771970 is an apocalyptic number.

13771970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13771970 is a deficient number, since it is larger than the sum of its proper divisors (11779966).

13771970 is a wasteful number, since it uses less digits than its factorization.

13771970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its (nonzero) digits is 9261, while the sum is 35.

The square root of 13771970 is about 3711.0604953301. The cubic root of 13771970 is about 239.6985219172.

It can be divided in two parts, 13771 and 970, that added together give a palindrome (14741).

The spelling of 13771970 in words is "thirteen million, seven hundred seventy-one thousand, nine hundred seventy".