23690157 has 4 divisors (see below), whose sum is σ = 31586880. Its totient is φ = 15793436.

The previous prime is 23690141. The next prime is 23690167. The reversal of 23690157 is 75109632.

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.

It is a cyclic number.

It is not a de Polignac number, because 23690157 - 2⁴ = 23690141 is a prime.

It is a super-2 number, since 2×23690157² = 1122447077369298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23690137) 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, 3948357 + ... + 3948362.

It is an arithmetic number, because the mean of its divisors is an integer number (7896720).

Almost surely, 2^23690157 is an apocalyptic number.

It is an amenable number.

23690157 is a deficient number, since it is larger than the sum of its proper divisors (7896723).

23690157 is an equidigital number, since it uses as much as digits as its factorization.

23690157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7896722.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 23690157 is about 4867.2535376740. The cubic root of 23690157 is about 287.2032254521.

Adding to 23690157 its reverse (75109632), we get a palindrome (98799789).

The spelling of 23690157 in words is "twenty-three million, six hundred ninety thousand, one hundred fifty-seven".