619897 has 2 divisors, whose sum is σ = 619898. Its totient is φ = 619896.

The previous prime is 619867. The next prime is 619909. The reversal of 619897 is 798916.

619897 is nontrivially palindromic in base 16.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385641 + 234256 = 621^2 + 484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-619897 is a prime.

It is not a weakly prime, because it can be changed into another prime (619807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309948 + 309949.

It is an arithmetic number, because the mean of its divisors is an integer number (309949).

2⁶¹⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

619897 is a deficient number, since it is larger than the sum of its proper divisors (1).

619897 is an equidigital number, since it uses as much as digits as its factorization.

619897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 619897 is about 787.3353796191. The cubic root of 619897 is about 85.2654676199.

The spelling of 619897 in words is "six hundred nineteen thousand, eight hundred ninety-seven".