649174201 has 4 divisors (see below), whose sum is σ = 699110692. Its totient is φ = 599237712.

The previous prime is 649174187. The next prime is 649174219. The reversal of 649174201 is 102471946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 169520400 + 479653801 = 13020^2 + 21901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649174201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649174601) 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, 24968226 + ... + 24968251.

It is an arithmetic number, because the mean of its divisors is an integer number (174777673).

Almost surely, 2^649174201 is an apocalyptic number.

It is an amenable number.

649174201 is a deficient number, since it is larger than the sum of its proper divisors (49936491).

649174201 is a wasteful number, since it uses less digits than its factorization.

649174201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49936490.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 649174201 is about 25478.8971700111. The cubic root of 649174201 is about 865.8721091678.

The spelling of 649174201 in words is "six hundred forty-nine million, one hundred seventy-four thousand, two hundred one".