649192465 has 4 divisors (see below), whose sum is σ = 779030964. Its totient is φ = 519353968.

The previous prime is 649192459. The next prime is 649192477. The reversal of 649192465 is 564291946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 499790736 + 149401729 = 22356^2 + 12223^2 .

It is a cyclic number.

It is not a de Polignac number, because 649192465 - 2¹³ = 649184273 is a prime.

It is a super-2 number, since 2×649192465² = 842901713225552450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64919242 + ... + 64919251.

It is an arithmetic number, because the mean of its divisors is an integer number (194757741).

Almost surely, 2^649192465 is an apocalyptic number.

It is an amenable number.

649192465 is a deficient number, since it is larger than the sum of its proper divisors (129838499).

649192465 is a wasteful number, since it uses less digits than its factorization.

649192465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129838498.

The product of its digits is 466560, while the sum is 46.

The square root of 649192465 is about 25479.2555817473. The cubic root of 649192465 is about 865.8802292994.

The spelling of 649192465 in words is "six hundred forty-nine million, one hundred ninety-two thousand, four hundred sixty-five".