13923157 has 4 divisors (see below), whose sum is σ = 14001120. Its totient is φ = 13845196.

The previous prime is 13923127. The next prime is 13923163. The reversal of 13923157 is 75132931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75132931 = 47 ⋅1598573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13923157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13923127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38713 + ... + 39070.

It is an arithmetic number, because the mean of its divisors is an integer number (3500280).

Almost surely, 2^13923157 is an apocalyptic number.

It is an amenable number.

13923157 is a deficient number, since it is larger than the sum of its proper divisors (77963).

13923157 is an equidigital number, since it uses as much as digits as its factorization.

13923157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77962.

The product of its digits is 5670, while the sum is 31.

The square root of 13923157 is about 3731.3746796590. The cubic root of 13923157 is about 240.5724586919.

The spelling of 13923157 in words is "thirteen million, nine hundred twenty-three thousand, one hundred fifty-seven".