123039457 has 2 divisors, whose sum is σ = 123039458. Its totient is φ = 123039456.

The previous prime is 123039439. The next prime is 123039461. The reversal of 123039457 is 754930321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99380961 + 23658496 = 9969^2 + 4864^2 .

It is a cyclic number.

It is not a de Polignac number, because 123039457 - 2²³ = 114650849 is a prime.

It is not a weakly prime, because it can be changed into another prime (123039437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61519728 + 61519729.

It is an arithmetic number, because the mean of its divisors is an integer number (61519729).

Almost surely, 2^123039457 is an apocalyptic number.

It is an amenable number.

123039457 is a deficient number, since it is larger than the sum of its proper divisors (1).

123039457 is an equidigital number, since it uses as much as digits as its factorization.

123039457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 123039457 is about 11092.3152227116. The cubic root of 123039457 is about 497.3721557313.

Adding to 123039457 its reverse (754930321), we get a palindrome (877969778).

The spelling of 123039457 in words is "one hundred twenty-three million, thirty-nine thousand, four hundred fifty-seven".