619952381 has 2 divisors, whose sum is σ = 619952382. Its totient is φ = 619952380.

The previous prime is 619952369. The next prime is 619952429. The reversal of 619952381 is 183259916.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476767225 + 143185156 = 21835^2 + 11966^2 .

It is a cyclic number.

It is not a de Polignac number, because 619952381 - 2²⁶ = 552843517 is a prime.

It is a super-2 number, since 2×619952381² = 768681909415138322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (619952341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309976190 + 309976191.

It is an arithmetic number, because the mean of its divisors is an integer number (309976191).

Almost surely, 2^619952381 is an apocalyptic number.

It is an amenable number.

619952381 is a deficient number, since it is larger than the sum of its proper divisors (1).

619952381 is an equidigital number, since it uses as much as digits as its factorization.

619952381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 619952381 is about 24898.8429650857. The cubic root of 619952381 is about 852.6800672253.

The spelling of 619952381 in words is "six hundred nineteen million, nine hundred fifty-two thousand, three hundred eighty-one".