169908953 has 4 divisors (see below), whose sum is σ = 173860368. Its totient is φ = 165957540.

The previous prime is 169908929. The next prime is 169908971. The reversal of 169908953 is 359809961.

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, and also an emirpimes, since its reverse is a distinct semiprime: 359809961 = 7 ⋅51401423.

It is a cyclic number.

It is not a de Polignac number, because 169908953 - 2¹⁸ = 169646809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169908653) 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, 1975643 + ... + 1975728.

It is an arithmetic number, because the mean of its divisors is an integer number (43465092).

Almost surely, 2^169908953 is an apocalyptic number.

It is an amenable number.

169908953 is a deficient number, since it is larger than the sum of its proper divisors (3951415).

169908953 is an equidigital number, since it uses as much as digits as its factorization.

169908953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951414.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 169908953 is about 13034.9128497278. The cubic root of 169908953 is about 553.8669120806.

The spelling of 169908953 in words is "one hundred sixty-nine million, nine hundred eight thousand, nine hundred fifty-three".