649179401 has 8 divisors (see below), whose sum is σ = 721668864. Its totient is φ = 579911760.

The previous prime is 649179373. The next prime is 649179449. The reversal of 649179401 is 104971946.

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-649179401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649179451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805031 + ... + 805836.

It is an arithmetic number, because the mean of its divisors is an integer number (90208608).

Almost surely, 2^649179401 is an apocalyptic number.

It is an amenable number.

649179401 is a deficient number, since it is larger than the sum of its proper divisors (72489463).

649179401 is a wasteful number, since it uses less digits than its factorization.

649179401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610911.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 649179401 is about 25478.9992150398. Note that the first 3 decimals coincide. The cubic root of 649179401 is about 865.8744210911.

The spelling of 649179401 in words is "six hundred forty-nine million, one hundred seventy-nine thousand, four hundred one".