123190866787 has 16 divisors (see below), whose sum is σ = 126325785600. Its totient is φ = 120094280320.

The previous prime is 123190866779. The next prime is 123190866791. The reversal of 123190866787 is 787668091321.

It is a cyclic number.

It is not a de Polignac number, because 123190866787 - 2³ = 123190866779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123190866587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4232139 + ... + 4261147.

It is an arithmetic number, because the mean of its divisors is an integer number (7895361600).

Almost surely, 2^123190866787 is an apocalyptic number.

123190866787 is a deficient number, since it is larger than the sum of its proper divisors (3134918813).

123190866787 is a wasteful number, since it uses less digits than its factorization.

123190866787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29666.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 123190866787 in words is "one hundred twenty-three billion, one hundred ninety million, eight hundred sixty-six thousand, seven hundred eighty-seven".