619391 has 2 divisors, whose sum is σ = 619392. Its totient is φ = 619390.

The previous prime is 619373. The next prime is 619397. The reversal of 619391 is 193916.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-619391 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 (619397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309695 + 309696.

It is an arithmetic number, because the mean of its divisors is an integer number (309696).

2⁶¹⁹³⁹¹ is an apocalyptic number.

619391 is a deficient number, since it is larger than the sum of its proper divisors (1).

619391 is an equidigital number, since it uses as much as digits as its factorization.

619391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 29.

The square root of 619391 is about 787.0139770042. The cubic root of 619391 is about 85.2422615760.

The spelling of 619391 in words is "six hundred nineteen thousand, three hundred ninety-one".