618149489 has 2 divisors, whose sum is σ = 618149490. Its totient is φ = 618149488.

The previous prime is 618149459. The next prime is 618149503. The reversal of 618149489 is 984941816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 584043889 + 34105600 = 24167^2 + 5840^2 .

It is a cyclic number.

It is not a de Polignac number, because 618149489 - 2¹⁶ = 618083953 is a prime.

It is a super-2 number, since 2×618149489² = 764217581501922242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (618149459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309074744 + 309074745.

It is an arithmetic number, because the mean of its divisors is an integer number (309074745).

Almost surely, 2^618149489 is an apocalyptic number.

It is an amenable number.

618149489 is a deficient number, since it is larger than the sum of its proper divisors (1).

618149489 is an equidigital number, since it uses as much as digits as its factorization.

618149489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 50.

The square root of 618149489 is about 24862.6122722452. The cubic root of 618149489 is about 851.8527011587.

The spelling of 618149489 in words is "six hundred eighteen million, one hundred forty-nine thousand, four hundred eighty-nine".