123780039 has 8 divisors (see below), whose sum is σ = 165138432. Its totient is φ = 82470840.

The previous prime is 123780037. The next prime is 123780049. The reversal of 123780039 is 930087321.

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

It is not a de Polignac number, because 123780039 - 2¹ = 123780037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123779991 and 123780009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123780031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5959 + ... + 16824.

It is an arithmetic number, because the mean of its divisors is an integer number (20642304).

Almost surely, 2^123780039 is an apocalyptic number.

123780039 is a deficient number, since it is larger than the sum of its proper divisors (41358393).

123780039 is a wasteful number, since it uses less digits than its factorization.

123780039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24597.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 123780039 is about 11125.6478013642. The cubic root of 123780039 is about 498.3680647026.

The spelling of 123780039 in words is "one hundred twenty-three million, seven hundred eighty thousand, thirty-nine".