13917945 has 8 divisors (see below), whose sum is σ = 22268736. Its totient is φ = 7422896.

The previous prime is 13917907. The next prime is 13917949. The reversal of 13917945 is 54971931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13917945 - 2⁶ = 13917881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13917949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463917 + ... + 463946.

It is an arithmetic number, because the mean of its divisors is an integer number (2783592).

Almost surely, 2^13917945 is an apocalyptic number.

13917945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13917945 is a deficient number, since it is larger than the sum of its proper divisors (8350791).

13917945 is an equidigital number, since it uses as much as digits as its factorization.

13917945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927871.

The product of its digits is 34020, while the sum is 39.

The square root of 13917945 is about 3730.6762121632. The cubic root of 13917945 is about 240.5424362828.

The spelling of 13917945 in words is "thirteen million, nine hundred seventeen thousand, nine hundred forty-five".