1385123623 has 8 divisors (see below), whose sum is σ = 1528054416. Its totient is φ = 1247390400.

The previous prime is 1385123609. The next prime is 1385123627. The reversal of 1385123623 is 3263215831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385123623 - 2⁵ = 1385123591 is a prime.

It is a super-2 number, since 2×1385123623² = 3837134901985292258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385123627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298833 + ... + 1299898.

It is an arithmetic number, because the mean of its divisors is an integer number (191006802).

Almost surely, 2^1385123623 is an apocalyptic number.

1385123623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1385123623 is a deficient number, since it is larger than the sum of its proper divisors (142930793).

1385123623 is a wasteful number, since it uses less digits than its factorization.

1385123623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598785.

The product of its digits is 25920, while the sum is 34.

The square root of 1385123623 is about 37217.2489982804. The cubic root of 1385123623 is about 1114.7124337673.

The spelling of 1385123623 in words is "one billion, three hundred eighty-five million, one hundred twenty-three thousand, six hundred twenty-three".