169945649 has 8 divisors (see below), whose sum is σ = 171964128. Its totient is φ = 167932800.

The previous prime is 169945637. The next prime is 169945663. The reversal of 169945649 is 946549961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169945649 is a prime.

It is a super-2 number, since 2×169945649² = 57763047228062402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 169945649.

It is not an unprimeable number, because it can be changed into a prime (169945609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101114 + ... + 102780.

It is an arithmetic number, because the mean of its divisors is an integer number (21495516).

Almost surely, 2^169945649 is an apocalyptic number.

It is an amenable number.

169945649 is a deficient number, since it is larger than the sum of its proper divisors (2018479).

169945649 is a wasteful number, since it uses less digits than its factorization.

169945649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815.

The product of its digits is 2099520, while the sum is 53.

The square root of 169945649 is about 13036.3203780822. The cubic root of 169945649 is about 553.9067829189.

The spelling of 169945649 in words is "one hundred sixty-nine million, nine hundred forty-five thousand, six hundred forty-nine".