123780069 has 48 divisors (see below), whose sum is σ = 216058752. Its totient is φ = 69346368.

The previous prime is 123780067. The next prime is 123780071. The reversal of 123780069 is 960087321.

It is an interprime number because it is at equal distance from previous prime (123780067) and next prime (123780071).

It is not a de Polignac number, because 123780069 - 2¹ = 123780067 is a prime.

It is a super-2 number, since 2×123780069² = 30643010963289522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123780067) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89467 + ... + 90839.

It is an arithmetic number, because the mean of its divisors is an integer number (4501224).

Almost surely, 2^123780069 is an apocalyptic number.

It is an amenable number.

123780069 is a deficient number, since it is larger than the sum of its proper divisors (92278683).

123780069 is an equidigital number, since it uses as much as digits as its factorization.

123780069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 1436 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 123780069 is about 11125.6491496002. The cubic root of 123780069 is about 498.3681049650.

The spelling of 123780069 in words is "one hundred twenty-three million, seven hundred eighty thousand, sixty-nine".