123870236899 has 2 divisors, whose sum is σ = 123870236900. Its totient is φ = 123870236898.

The previous prime is 123870236827. The next prime is 123870236923. The reversal of 123870236899 is 998632078321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123870236899 is a prime.

It is a super-2 number, since 2×123870236899² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123870236099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61935118449 + 61935118450.

It is an arithmetic number, because the mean of its divisors is an integer number (61935118450).

Almost surely, 2^123870236899 is an apocalyptic number.

123870236899 is a deficient number, since it is larger than the sum of its proper divisors (1).

123870236899 is an equidigital number, since it uses as much as digits as its factorization.

123870236899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 123870236899 in words is "one hundred twenty-three billion, eight hundred seventy million, two hundred thirty-six thousand, eight hundred ninety-nine".