618979487 has 4 divisors (see below), whose sum is σ = 707405136. Its totient is φ = 530553840.

The previous prime is 618979477. The next prime is 618979489. The reversal of 618979487 is 784979816.

618979487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 618979487 - 2¹⁰ = 618978463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618979489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44212814 + ... + 44212827.

It is an arithmetic number, because the mean of its divisors is an integer number (176851284).

Almost surely, 2^618979487 is an apocalyptic number.

618979487 is a deficient number, since it is larger than the sum of its proper divisors (88425649).

618979487 is an equidigital number, since it uses as much as digits as its factorization.

618979487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88425648.

The product of its digits is 6096384, while the sum is 59.

The square root of 618979487 is about 24879.2983622931. The cubic root of 618979487 is about 852.2337955044.

The spelling of 618979487 in words is "six hundred eighteen million, nine hundred seventy-nine thousand, four hundred eighty-seven".