618729049 has 8 divisors (see below), whose sum is σ = 657813312. Its totient is φ = 580660080.

The previous prime is 618729019. The next prime is 618729071. The reversal of 618729049 is 940927816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 618729049 - 2⁷ = 618728921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618729019) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 252567 + ... + 255004.

It is an arithmetic number, because the mean of its divisors is an integer number (82226664).

Almost surely, 2^618729049 is an apocalyptic number.

It is an amenable number.

618729049 is a deficient number, since it is larger than the sum of its proper divisors (39084263).

618729049 is a wasteful number, since it uses less digits than its factorization.

618729049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507647.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 618729049 is about 24874.2647931552. The cubic root of 618729049 is about 852.1188425735.

The spelling of 618729049 in words is "six hundred eighteen million, seven hundred twenty-nine thousand, forty-nine".