618790913 has 8 divisors (see below), whose sum is σ = 669881856. Its totient is φ = 568198800.

The previous prime is 618790897. The next prime is 618790933. The reversal of 618790913 is 319097816.

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

It is not a de Polignac number, because 618790913 - 2⁴ = 618790897 is a prime.

It is a super-2 number, since 2×618790913² = 765804388022747138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618790933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122123 + ... + 127088.

It is an arithmetic number, because the mean of its divisors is an integer number (83735232).

It is a Proth number, since it is equal to 4721 ⋅ 2¹⁷ + 1 and 4721 < 2¹⁷.

Almost surely, 2^618790913 is an apocalyptic number.

It is an amenable number.

618790913 is a deficient number, since it is larger than the sum of its proper divisors (51090943).

618790913 is a wasteful number, since it uses less digits than its factorization.

618790913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249415.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 618790913 is about 24875.5082963143. The cubic root of 618790913 is about 852.1472415005.

The spelling of 618790913 in words is "six hundred eighteen million, seven hundred ninety thousand, nine hundred thirteen".