649361039 has 4 divisors (see below), whose sum is σ = 649441560. Its totient is φ = 649280520.

The previous prime is 649361023. The next prime is 649361077. The reversal of 649361039 is 930163946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930163946 = 2 ⋅465081973.

It is a cyclic number.

It is not a de Polignac number, because 649361039 - 2⁴ = 649361023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649360987 and 649361005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649361099) 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 3 ways as a sum of consecutive naturals, for example, 26624 + ... + 44805.

It is an arithmetic number, because the mean of its divisors is an integer number (162360390).

Almost surely, 2^649361039 is an apocalyptic number.

649361039 is a deficient number, since it is larger than the sum of its proper divisors (80521).

649361039 is an equidigital number, since it uses as much as digits as its factorization.

649361039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80520.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 649361039 is about 25482.5634307069. The cubic root of 649361039 is about 865.9551697161.

The spelling of 649361039 in words is "six hundred forty-nine million, three hundred sixty-one thousand, thirty-nine".