649929946 has 8 divisors (see below), whose sum is σ = 976035060. Its totient is φ = 324584928.

The previous prime is 649929881. The next prime is 649929947.

649929946 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 606883225 + 43046721 = 24635^2 + 6561^2 .

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

It is not an unprimeable number, because it can be changed into a prime (649929947) 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, 187881 + ... + 191308.

Almost surely, 2^649929946 is an apocalyptic number.

649929946 is a deficient number, since it is larger than the sum of its proper divisors (326105114).

649929946 is a wasteful number, since it uses less digits than its factorization.

649929946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380048.

The product of its digits is 7558272, while the sum is 58.

The square root of 649929946 is about 25493.7236589714. The cubic root of 649929946 is about 866.2079844719.

The spelling of 649929946 in words is "six hundred forty-nine million, nine hundred twenty-nine thousand, nine hundred forty-six".