13690157 has 4 divisors (see below), whose sum is σ = 14743260. Its totient is φ = 12637056.

The previous prime is 13690153. The next prime is 13690181. The reversal of 13690157 is 75109631.

13690157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75109631 = 113 ⋅664687.

It can be written as a sum of positive squares in 2 ways, for example, as 1503076 + 12187081 = 1226^2 + 3491^2 .

It is a cyclic number.

It is not a de Polignac number, because 13690157 - 2² = 13690153 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 (13690153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526532 + ... + 526557.

It is an arithmetic number, because the mean of its divisors is an integer number (3685815).

Almost surely, 2^13690157 is an apocalyptic number.

It is an amenable number.

13690157 is a deficient number, since it is larger than the sum of its proper divisors (1053103).

13690157 is a wasteful number, since it uses less digits than its factorization.

13690157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053102.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 13690157 is about 3700.0212161554. The cubic root of 13690157 is about 239.2229323416. Note that the first 3 decimals are identical.

Adding to 13690157 its reverse (75109631), we get a palindrome (88799788).

The spelling of 13690157 in words is "thirteen million, six hundred ninety thousand, one hundred fifty-seven".