171620969 has 16 divisors (see below), whose sum is σ = 189501312. Its totient is φ = 154459008.

The previous prime is 171620951. The next prime is 171620971. The reversal of 171620969 is 969026171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171620969 is a prime.

It is a super-2 number, since 2×171620969² = 58907514000997922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (171620909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88757 + ... + 90669.

It is an arithmetic number, because the mean of its divisors is an integer number (11843832).

Almost surely, 2^171620969 is an apocalyptic number.

It is an amenable number.

171620969 is a deficient number, since it is larger than the sum of its proper divisors (17880343).

171620969 is a wasteful number, since it uses less digits than its factorization.

171620969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 171620969 is about 13100.4186574323. The cubic root of 171620969 is about 555.7209676354.

The spelling of 171620969 in words is "one hundred seventy-one million, six hundred twenty thousand, nine hundred sixty-nine".