618997705 has 8 divisors (see below), whose sum is σ = 760914504. Its totient is φ = 483120000.

The previous prime is 618997699. The next prime is 618997723. The reversal of 618997705 is 507799816.

It is a happy number.

618997705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 182329 + 618815376 = 427^2 + 24876^2 .

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

It is not a de Polignac number, because 618997705 - 2¹³ = 618989513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509546 + ... + 1509955.

It is an arithmetic number, because the mean of its divisors is an integer number (95114313).

Almost surely, 2^618997705 is an apocalyptic number.

It is an amenable number.

618997705 is a deficient number, since it is larger than the sum of its proper divisors (141916799).

618997705 is a wasteful number, since it uses less digits than its factorization.

618997705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019547.

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 618997705 is about 24879.6644872876. The cubic root of 618997705 is about 852.2421564939.

The spelling of 618997705 in words is "six hundred eighteen million, nine hundred ninety-seven thousand, seven hundred five".