1385623819 has 2 divisors, whose sum is σ = 1385623820. Its totient is φ = 1385623818.

The previous prime is 1385623763. The next prime is 1385623831. The reversal of 1385623819 is 9183265831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1385623819 - 2¹⁷ = 1385492747 is a prime.

It is a super-2 number, since 2×1385623819² = 3839906735560289522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1385621819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692811909 + 692811910.

It is an arithmetic number, because the mean of its divisors is an integer number (692811910).

Almost surely, 2^1385623819 is an apocalyptic number.

1385623819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385623819 is an equidigital number, since it uses as much as digits as its factorization.

1385623819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 1385623819 is about 37223.9683403046. The cubic root of 1385623819 is about 1114.8465993122.

It can be divided in two parts, 13856 and 23819, that added together give a triangular number (37675 = T₂₇₄).

The spelling of 1385623819 in words is "one billion, three hundred eighty-five million, six hundred twenty-three thousand, eight hundred nineteen".