23706157 has 4 divisors (see below), whose sum is σ = 23916060. Its totient is φ = 23496256.

The previous prime is 23706139. The next prime is 23706161. The reversal of 23706157 is 75160732.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13169641 + 10536516 = 3629^2 + 3246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23706157 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 (23706107) 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, 104782 + ... + 105007.

It is an arithmetic number, because the mean of its divisors is an integer number (5979015).

Almost surely, 2^23706157 is an apocalyptic number.

It is an amenable number.

23706157 is a deficient number, since it is larger than the sum of its proper divisors (209903).

23706157 is a wasteful number, since it uses less digits than its factorization.

23706157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209902.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 23706157 is about 4868.8968976556. The cubic root of 23706157 is about 287.2678685790.

Adding to 23706157 its reverse (75160732), we get a palindrome (98866889).

The spelling of 23706157 in words is "twenty-three million, seven hundred six thousand, one hundred fifty-seven".