13213977 has 12 divisors (see below), whose sum is σ = 20495376. Its totient is φ = 7550760.

The previous prime is 13213951. The next prime is 13213979. The reversal of 13213977 is 77931231.

It is a happy number.

13213977 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13213977 - 2¹² = 13209881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13213979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44799 + ... + 45092.

It is an arithmetic number, because the mean of its divisors is an integer number (1707948).

Almost surely, 2^13213977 is an apocalyptic number.

It is an amenable number.

13213977 is a deficient number, since it is larger than the sum of its proper divisors (7281399).

13213977 is an equidigital number, since it uses as much as digits as its factorization.

13213977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89908 (or 89901 counting only the distinct ones).

The product of its digits is 7938, while the sum is 33.

The square root of 13213977 is about 3635.1034373178. The cubic root of 13213977 is about 236.4165355287.

The spelling of 13213977 in words is "thirteen million, two hundred thirteen thousand, nine hundred seventy-seven".