649616419 has 4 divisors (see below), whose sum is σ = 649934896. Its totient is φ = 649297944.

The previous prime is 649616411. The next prime is 649616449. The reversal of 649616419 is 914616946.

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

It is a cyclic number.

It is not a de Polignac number, because 649616419 - 2³ = 649616411 is a prime.

It is a super-2 number, since 2×649616419² = 844002983668767122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649616411) 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, 156159 + ... + 160264.

It is an arithmetic number, because the mean of its divisors is an integer number (162483724).

Almost surely, 2^649616419 is an apocalyptic number.

649616419 is a deficient number, since it is larger than the sum of its proper divisors (318477).

649616419 is a wasteful number, since it uses less digits than its factorization.

649616419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318476.

The product of its digits is 279936, while the sum is 46.

The square root of 649616419 is about 25487.5738154890. The cubic root of 649616419 is about 866.0686754719.

The spelling of 649616419 in words is "six hundred forty-nine million, six hundred sixteen thousand, four hundred nineteen".