649658073 has 4 divisors (see below), whose sum is σ = 866210768. Its totient is φ = 433105380.

The previous prime is 649658071. The next prime is 649658083. The reversal of 649658073 is 370856946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 649658073 - 2¹ = 649658071 is a prime.

It is a super-2 number, since 2×649658073² = 844111223628146658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649658071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108276343 + ... + 108276348.

It is an arithmetic number, because the mean of its divisors is an integer number (216552692).

Almost surely, 2^649658073 is an apocalyptic number.

It is an amenable number.

649658073 is a deficient number, since it is larger than the sum of its proper divisors (216552695).

649658073 is a wasteful number, since it uses less digits than its factorization.

649658073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216552694.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 649658073 is about 25488.3909456835. The cubic root of 649658073 is about 866.0871861153.

The spelling of 649658073 in words is "six hundred forty-nine million, six hundred fifty-eight thousand, seventy-three".