649890695 has 8 divisors (see below), whose sum is σ = 780381600. Its totient is φ = 519570720.

The previous prime is 649890653. The next prime is 649890697. The reversal of 649890695 is 596098946.

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

It is a de Polignac number, because none of the positive numbers 2^k-649890695 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649890695.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649890697) 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, 34211 + ... + 49700.

It is an arithmetic number, because the mean of its divisors is an integer number (97547700).

Almost surely, 2^649890695 is an apocalyptic number.

649890695 is a deficient number, since it is larger than the sum of its proper divisors (130490905).

649890695 is a wasteful number, since it uses less digits than its factorization.

649890695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85465.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The square root of 649890695 is about 25492.9538304215. The cubic root of 649890695 is about 866.1905465854.

The spelling of 649890695 in words is "six hundred forty-nine million, eight hundred ninety thousand, six hundred ninety-five".