13671957 has 8 divisors (see below), whose sum is σ = 19631584. Its totient is φ = 8413488.

The previous prime is 13671949. The next prime is 13671967. The reversal of 13671957 is 75917631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13671957 - 2³ = 13671949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 350563 = 13671957 / (1 + 3 + 6 + 7 + 1 + 9 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13671947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175243 + ... + 175320.

It is an arithmetic number, because the mean of its divisors is an integer number (2453948).

Almost surely, 2^13671957 is an apocalyptic number.

It is an amenable number.

13671957 is a deficient number, since it is larger than the sum of its proper divisors (5959627).

13671957 is a wasteful number, since it uses less digits than its factorization.

13671957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350579.

The product of its digits is 39690, while the sum is 39.

The square root of 13671957 is about 3697.5609528445. The cubic root of 13671957 is about 239.1168758962.

The spelling of 13671957 in words is "thirteen million, six hundred seventy-one thousand, nine hundred fifty-seven".