611790649 has 4 divisors (see below), whose sum is σ = 611963136. Its totient is φ = 611618164.

The previous prime is 611790559. The next prime is 611790659. The reversal of 611790649 is 946097116.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 611790649 - 2¹⁹ = 611266361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611790659) 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, 80809 + ... + 88054.

It is an arithmetic number, because the mean of its divisors is an integer number (152990784).

Almost surely, 2^611790649 is an apocalyptic number.

It is an amenable number.

611790649 is a deficient number, since it is larger than the sum of its proper divisors (172487).

611790649 is a wasteful number, since it uses less digits than its factorization.

611790649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172486.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 611790649 is about 24734.4021354873. The cubic root of 611790649 is about 848.9216539964.

The spelling of 611790649 in words is "six hundred eleven million, seven hundred ninety thousand, six hundred forty-nine".