649914173 has 4 divisors (see below), whose sum is σ = 650054400. Its totient is φ = 649773948.

The previous prime is 649914149. The next prime is 649914203. The reversal of 649914173 is 371419946.

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: 371419946 = 2 ⋅185709973.

It is a cyclic number.

It is not a de Polignac number, because 649914173 - 2¹⁰ = 649913149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649914103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62915 + ... + 72512.

It is an arithmetic number, because the mean of its divisors is an integer number (162513600).

Almost surely, 2^649914173 is an apocalyptic number.

It is an amenable number.

649914173 is a deficient number, since it is larger than the sum of its proper divisors (140227).

649914173 is a wasteful number, since it uses less digits than its factorization.

649914173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140226.

The product of its digits is 163296, while the sum is 44.

The square root of 649914173 is about 25493.4143064439. The cubic root of 649914173 is about 866.2009771480.

The spelling of 649914173 in words is "six hundred forty-nine million, nine hundred fourteen thousand, one hundred seventy-three".