619138469 has 2 divisors, whose sum is σ = 619138470. Its totient is φ = 619138468.

The previous prime is 619138463. The next prime is 619138493. The reversal of 619138469 is 964831916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504541444 + 114597025 = 22462^2 + 10705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-619138469 is a prime.

It is a super-2 number, since 2×619138469² = 766664887591327922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (619138463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309569234 + 309569235.

It is an arithmetic number, because the mean of its divisors is an integer number (309569235).

Almost surely, 2^619138469 is an apocalyptic number.

It is an amenable number.

619138469 is a deficient number, since it is larger than the sum of its proper divisors (1).

619138469 is an equidigital number, since it uses as much as digits as its factorization.

619138469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 619138469 is about 24882.4932231479. The cubic root of 619138469 is about 852.3067533529.

The spelling of 619138469 in words is "six hundred nineteen million, one hundred thirty-eight thousand, four hundred sixty-nine".