618769397 has 2 divisors, whose sum is σ = 618769398. Its totient is φ = 618769396.

The previous prime is 618769369. The next prime is 618769453. The reversal of 618769397 is 793967816.

It is an a-pointer prime, because the next prime (618769453) can be obtained adding 618769397 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536431921 + 82337476 = 23161^2 + 9074^2 .

It is a cyclic number.

It is not a de Polignac number, because 618769397 - 2⁸ = 618769141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618769357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309384698 + 309384699.

It is an arithmetic number, because the mean of its divisors is an integer number (309384699).

Almost surely, 2^618769397 is an apocalyptic number.

It is an amenable number.

618769397 is a deficient number, since it is larger than the sum of its proper divisors (1).

618769397 is an equidigital number, since it uses as much as digits as its factorization.

618769397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 618769397 is about 24875.0758189799. The cubic root of 618769397 is about 852.1373647057.

The spelling of 618769397 in words is "six hundred eighteen million, seven hundred sixty-nine thousand, three hundred ninety-seven".