123161513 has 2 divisors, whose sum is σ = 123161514. Its totient is φ = 123161512.

The previous prime is 123161509. The next prime is 123161539. The reversal of 123161513 is 315161321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94731289 + 28430224 = 9733^2 + 5332^2 .

It is a cyclic number.

It is not a de Polignac number, because 123161513 - 2² = 123161509 is a prime.

It is not a weakly prime, because it can be changed into another prime (123161593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61580756 + 61580757.

It is an arithmetic number, because the mean of its divisors is an integer number (61580757).

Almost surely, 2^123161513 is an apocalyptic number.

It is an amenable number.

123161513 is a deficient number, since it is larger than the sum of its proper divisors (1).

123161513 is an equidigital number, since it uses as much as digits as its factorization.

123161513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 23.

The square root of 123161513 is about 11097.8156859807. The cubic root of 123161513 is about 497.5365669275.

The spelling of 123161513 in words is "one hundred twenty-three million, one hundred sixty-one thousand, five hundred thirteen".