123621007 has 2 divisors, whose sum is σ = 123621008. Its totient is φ = 123621006.

The previous prime is 123620999. The next prime is 123621019. The reversal of 123621007 is 700126321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123621007 - 2³ = 123620999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123621037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61810503 + 61810504.

It is an arithmetic number, because the mean of its divisors is an integer number (61810504).

Almost surely, 2^123621007 is an apocalyptic number.

123621007 is a deficient number, since it is larger than the sum of its proper divisors (1).

123621007 is an equidigital number, since it uses as much as digits as its factorization.

123621007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 123621007 is about 11118.4984148040. The cubic root of 123621007 is about 498.1545395987.

Adding to 123621007 its reverse (700126321), we get a palindrome (823747328).

The spelling of 123621007 in words is "one hundred twenty-three million, six hundred twenty-one thousand, seven".