168247649 has 4 divisors (see below), whose sum is σ = 169187760. Its totient is φ = 167307540.

The previous prime is 168247609. The next prime is 168247661. The reversal of 168247649 is 946742861.

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 168247649 - 2⁸ = 168247393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168247609) 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, 469787 + ... + 470144.

It is an arithmetic number, because the mean of its divisors is an integer number (42296940).

Almost surely, 2^168247649 is an apocalyptic number.

It is an amenable number.

168247649 is a deficient number, since it is larger than the sum of its proper divisors (940111).

168247649 is an equidigital number, since it uses as much as digits as its factorization.

168247649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940110.

The product of its digits is 580608, while the sum is 47.

The square root of 168247649 is about 12971.0311463661. The cubic root of 168247649 is about 552.0558310556.

The spelling of 168247649 in words is "one hundred sixty-eight million, two hundred forty-seven thousand, six hundred forty-nine".