646349 has 8 divisors (see below), whose sum is σ = 716448. Its totient is φ = 578160.
The previous prime is 646339. The next prime is 646379. The reversal of 646349 is 943646.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 646349 - 212 = 642253 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 (646309) 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, 299 + ... + 1175.
It is an arithmetic number, because the mean of its divisors is an integer number (89556).
2646349 is an apocalyptic number.
It is an amenable number.
646349 is a deficient number, since it is larger than the sum of its proper divisors (70099).
646349 is a wasteful number, since it uses less digits than its factorization.
646349 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 955.
The product of its digits is 15552, while the sum is 32.
The square root of 646349 is about 803.9583322536. The cubic root of 646349 is about 86.4614193057.
The spelling of 646349 in words is "six hundred forty-six thousand, three hundred forty-nine".
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