649061 has 4 divisors (see below), whose sum is σ = 741792. Its totient is φ = 556332.

The previous prime is 649039. The next prime is 649063. The reversal of 649061 is 160946.

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, and also an emirpimes, since its reverse is a distinct semiprime: 160946 = 2 ⋅80473.

It is not a de Polignac number, because 649061 - 2⁶ = 648997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649063) 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, 46355 + ... + 46368.

It is an arithmetic number, because the mean of its divisors is an integer number (185448).

2⁶⁴⁹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

649061 is a deficient number, since it is larger than the sum of its proper divisors (92731).

649061 is an equidigital number, since it uses as much as digits as its factorization.

649061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92730.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 649061 is about 805.6432212835. The cubic root of 649061 is about 86.5821776871.

The spelling of 649061 in words is "six hundred forty-nine thousand, sixty-one".