123621349 has 2 divisors, whose sum is σ = 123621350. Its totient is φ = 123621348.

The previous prime is 123621347. The next prime is 123621383. The reversal of 123621349 is 943126321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114276100 + 9345249 = 10690^2 + 3057^2 .

It is a cyclic number.

It is not a de Polignac number, because 123621349 - 2¹ = 123621347 is a prime.

Together with 123621347, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123621349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123621347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61810674 + 61810675.

It is an arithmetic number, because the mean of its divisors is an integer number (61810675).

Almost surely, 2^123621349 is an apocalyptic number.

It is an amenable number.

123621349 is a deficient number, since it is larger than the sum of its proper divisors (1).

123621349 is an equidigital number, since it uses as much as digits as its factorization.

123621349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 123621349 is about 11118.5137945680. The cubic root of 123621349 is about 498.1549989831.

The spelling of 123621349 in words is "one hundred twenty-three million, six hundred twenty-one thousand, three hundred forty-nine".