23690137 has 2 divisors, whose sum is σ = 23690138. Its totient is φ = 23690136.

The previous prime is 23690083. The next prime is 23690141. The reversal of 23690137 is 73109632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19263321 + 4426816 = 4389^2 + 2104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23690137 is a prime.

It is a super-2 number, since 2×23690137² = 1122445182157538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23690099 and 23690108.

It is not a weakly prime, because it can be changed into another prime (23690167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11845068 + 11845069.

It is an arithmetic number, because the mean of its divisors is an integer number (11845069).

Almost surely, 2^23690137 is an apocalyptic number.

It is an amenable number.

23690137 is a deficient number, since it is larger than the sum of its proper divisors (1).

23690137 is an equidigital number, since it uses as much as digits as its factorization.

23690137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 23690137 is about 4867.2514831268. The cubic root of 23690137 is about 287.2031446300.

Adding to 23690137 its reverse (73109632), we get a palindrome (96799769).

The spelling of 23690137 in words is "twenty-three million, six hundred ninety thousand, one hundred thirty-seven".