649750497 has 16 divisors (see below), whose sum is σ = 945528768. Its totient is φ = 393606080.

The previous prime is 649750393. The next prime is 649750501. The reversal of 649750497 is 794057946.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649750497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649750697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113803 + ... + 119375.

It is an arithmetic number, because the mean of its divisors is an integer number (59095548).

Almost surely, 2^649750497 is an apocalyptic number.

It is an amenable number.

649750497 is a deficient number, since it is larger than the sum of its proper divisors (295778271).

649750497 is a wasteful number, since it uses less digits than its factorization.

649750497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9120.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The square root of 649750497 is about 25490.2039419068. The cubic root of 649750497 is about 866.1282556408.

The spelling of 649750497 in words is "six hundred forty-nine million, seven hundred fifty thousand, four hundred ninety-seven".