649957463 has 4 divisors (see below), whose sum is σ = 652008120. Its totient is φ = 647906808.

The previous prime is 649957459. The next prime is 649957489. The reversal of 649957463 is 364759946.

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 649957463 - 2² = 649957459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649957403) 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, 1024853 + ... + 1025486.

It is an arithmetic number, because the mean of its divisors is an integer number (163002030).

Almost surely, 2^649957463 is an apocalyptic number.

649957463 is a deficient number, since it is larger than the sum of its proper divisors (2050657).

649957463 is a wasteful number, since it uses less digits than its factorization.

649957463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050656.

The product of its digits is 4898880, while the sum is 53.

The square root of 649957463 is about 25494.2633351113. The cubic root of 649957463 is about 866.2202089221.

The spelling of 649957463 in words is "six hundred forty-nine million, nine hundred fifty-seven thousand, four hundred sixty-three".