649877213 has 8 divisors (see below), whose sum is σ = 696461568. Its totient is φ = 604820304.

The previous prime is 649877201. The next prime is 649877219. The reversal of 649877213 is 312778946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649877213 - 2⁸ = 649876957 is a prime.

It is a super-3 number, since 3×649877213³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649877219) 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, 380981 + ... + 382682.

It is an arithmetic number, because the mean of its divisors is an integer number (87057696).

Almost surely, 2^649877213 is an apocalyptic number.

It is an amenable number.

649877213 is a deficient number, since it is larger than the sum of its proper divisors (46584355).

649877213 is a wasteful number, since it uses less digits than its factorization.

649877213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763723.

The product of its digits is 508032, while the sum is 47.

The square root of 649877213 is about 25492.6894030426. The cubic root of 649877213 is about 866.1845568285.

The spelling of 649877213 in words is "six hundred forty-nine million, eight hundred seventy-seven thousand, two hundred thirteen".