649354197 has 4 divisors (see below), whose sum is σ = 865805600. Its totient is φ = 432902796.

The previous prime is 649354171. The next prime is 649354229. The reversal of 649354197 is 791453946.

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.

It is not a de Polignac number, because 649354197 - 2⁶ = 649354133 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 (649354297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108225697 + ... + 108225702.

It is an arithmetic number, because the mean of its divisors is an integer number (216451400).

Almost surely, 2^649354197 is an apocalyptic number.

It is an amenable number.

649354197 is a deficient number, since it is larger than the sum of its proper divisors (216451403).

649354197 is a wasteful number, since it uses less digits than its factorization.

649354197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216451402.

The product of its digits is 816480, while the sum is 48.

The square root of 649354197 is about 25482.4291816930. The cubic root of 649354197 is about 865.9521283232.

The spelling of 649354197 in words is "six hundred forty-nine million, three hundred fifty-four thousand, one hundred ninety-seven".