123724961 has 2 divisors, whose sum is σ = 123724962. Its totient is φ = 123724960.

The previous prime is 123724927. The next prime is 123724967. The reversal of 123724961 is 169427321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81721600 + 42003361 = 9040^2 + 6481^2 .

It is a cyclic number.

It is not a de Polignac number, because 123724961 - 2²² = 119530657 is a prime.

It is not a weakly prime, because it can be changed into another prime (123724967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61862480 + 61862481.

It is an arithmetic number, because the mean of its divisors is an integer number (61862481).

Almost surely, 2^123724961 is an apocalyptic number.

It is an amenable number.

123724961 is a deficient number, since it is larger than the sum of its proper divisors (1).

123724961 is an equidigital number, since it uses as much as digits as its factorization.

123724961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 123724961 is about 11123.1722543526. The cubic root of 123724961 is about 498.2941346656.

The spelling of 123724961 in words is "one hundred twenty-three million, seven hundred twenty-four thousand, nine hundred sixty-one".