649860873 has 8 divisors (see below), whose sum is σ = 877449600. Its totient is φ = 427756368.

The previous prime is 649860863. The next prime is 649860881. The reversal of 649860873 is 378068946.

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

It is not a de Polignac number, because 649860873 - 2¹⁰ = 649859849 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (649860863) 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, 1370778 + ... + 1371251.

It is an arithmetic number, because the mean of its divisors is an integer number (109681200).

Almost surely, 2^649860873 is an apocalyptic number.

It is an amenable number.

649860873 is a deficient number, since it is larger than the sum of its proper divisors (227588727).

649860873 is a wasteful number, since it uses less digits than its factorization.

649860873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742111.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 649860873 is about 25492.3689169916. The cubic root of 649860873 is about 866.1772972139.

The spelling of 649860873 in words is "six hundred forty-nine million, eight hundred sixty thousand, eight hundred seventy-three".