649192917 has 32 divisors (see below), whose sum is σ = 937230336. Its totient is φ = 398534400.

The previous prime is 649192879. The next prime is 649192933. The reversal of 649192917 is 719291946.

It is not a de Polignac number, because 649192917 - 2¹⁴ = 649176533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649193917) 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 31 ways as a sum of consecutive naturals, for example, 476317 + ... + 477677.

It is an arithmetic number, because the mean of its divisors is an integer number (29288448).

Almost surely, 2^649192917 is an apocalyptic number.

It is an amenable number.

649192917 is a deficient number, since it is larger than the sum of its proper divisors (288037419).

649192917 is a wasteful number, since it uses less digits than its factorization.

649192917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641.

The product of its digits is 244944, while the sum is 48.

The square root of 649192917 is about 25479.2644517066. The cubic root of 649192917 is about 865.8804302556.

It can be divided in two parts, 6491929 and 17, that added together give a palindrome (6491946).

The spelling of 649192917 in words is "six hundred forty-nine million, one hundred ninety-two thousand, nine hundred seventeen".