13928507 has 4 divisors (see below), whose sum is σ = 13988520. Its totient is φ = 13868496.

The previous prime is 13928503. The next prime is 13928531. The reversal of 13928507 is 70582931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70582931 = 131 ⋅538801.

It is a cyclic number.

It is not a de Polignac number, because 13928507 - 2² = 13928503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13928503) 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 3 ways as a sum of consecutive naturals, for example, 29657 + ... + 30122.

It is an arithmetic number, because the mean of its divisors is an integer number (3497130).

Almost surely, 2^13928507 is an apocalyptic number.

13928507 is a deficient number, since it is larger than the sum of its proper divisors (60013).

13928507 is an equidigital number, since it uses as much as digits as its factorization.

13928507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60012.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 13928507 is about 3732.0915047732. The cubic root of 13928507 is about 240.6032682235.

The spelling of 13928507 in words is "thirteen million, nine hundred twenty-eight thousand, five hundred seven".