1378206123 has 32 divisors (see below), whose sum is σ = 2140672512. Its totient is φ = 772416000.

The previous prime is 1378206107. The next prime is 1378206139. The reversal of 1378206123 is 3216028731.

It is an interprime number because it is at equal distance from previous prime (1378206107) and next prime (1378206139).

It is not a de Polignac number, because 1378206123 - 2⁴ = 1378206107 is a prime.

It is a super-2 number, since 2×1378206123² = 3798904234949382258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378206623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 512340 + ... + 515022.

It is an arithmetic number, because the mean of its divisors is an integer number (66896016).

Almost surely, 2^1378206123 is an apocalyptic number.

1378206123 is a deficient number, since it is larger than the sum of its proper divisors (762466389).

1378206123 is a wasteful number, since it uses less digits than its factorization.

1378206123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1378206123 is about 37124.1986176133. The cubic root of 1378206123 is about 1112.8536596941.

The spelling of 1378206123 in words is "one billion, three hundred seventy-eight million, two hundred six thousand, one hundred twenty-three".