169643157 has 4 divisors (see below), whose sum is σ = 226190880. Its totient is φ = 113095436.

The previous prime is 169643143. The next prime is 169643161. The reversal of 169643157 is 751346961.

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 169643157 - 2⁴ = 169643141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169643197) 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, 28273857 + ... + 28273862.

It is an arithmetic number, because the mean of its divisors is an integer number (56547720).

Almost surely, 2^169643157 is an apocalyptic number.

It is an amenable number.

169643157 is a deficient number, since it is larger than the sum of its proper divisors (56547723).

169643157 is an equidigital number, since it uses as much as digits as its factorization.

169643157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56547722.

The product of its digits is 136080, while the sum is 42.

The square root of 169643157 is about 13024.7133173825. The cubic root of 169643157 is about 553.5779486108.

The spelling of 169643157 in words is "one hundred sixty-nine million, six hundred forty-three thousand, one hundred fifty-seven".