649407407 has 8 divisors (see below), whose sum is σ = 708920400. Its totient is φ = 589973760.

The previous prime is 649407391. The next prime is 649407419. The reversal of 649407407 is 704704946.

It is a happy number.

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 649407407 - 2⁴ = 649407391 is a prime.

It is a Duffinian number.

649407407 is a modest number, since divided by 407407 gives 649 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649407467) 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, 2018 + ... + 36095.

It is an arithmetic number, because the mean of its divisors is an integer number (88615050).

Almost surely, 2^649407407 is an apocalyptic number.

649407407 is a deficient number, since it is larger than the sum of its proper divisors (59512993).

649407407 is a wasteful number, since it uses less digits than its factorization.

649407407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39673.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 649407407 is about 25483.4732130454. The cubic root of 649407407 is about 865.9757805685.

The spelling of 649407407 in words is "six hundred forty-nine million, four hundred seven thousand, four hundred seven".