123724099 has 2 divisors, whose sum is σ = 123724100. Its totient is φ = 123724098.

The previous prime is 123724031. The next prime is 123724109. The reversal of 123724099 is 990427321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123724099 is a prime.

It is not a weakly prime, because it can be changed into another prime (123724399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61862049 + 61862050.

It is an arithmetic number, because the mean of its divisors is an integer number (61862050).

Almost surely, 2^123724099 is an apocalyptic number.

123724099 is a deficient number, since it is larger than the sum of its proper divisors (1).

123724099 is an equidigital number, since it uses as much as digits as its factorization.

123724099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 123724099 is about 11123.1335063461. The cubic root of 123724099 is about 498.2929774469.

It can be divided in two parts, 12372 and 4099, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 123724099 in words is "one hundred twenty-three million, seven hundred twenty-four thousand, ninety-nine".