122538649 has 2 divisors, whose sum is σ = 122538650. Its totient is φ = 122538648.

The previous prime is 122538631. The next prime is 122538653. The reversal of 122538649 is 946835221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122500624 + 38025 = 11068^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 122538649 - 2¹⁵ = 122505881 is a prime.

It is not a weakly prime, because it can be changed into another prime (122538349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61269324 + 61269325.

It is an arithmetic number, because the mean of its divisors is an integer number (61269325).

Almost surely, 2^122538649 is an apocalyptic number.

It is an amenable number.

122538649 is a deficient number, since it is larger than the sum of its proper divisors (1).

122538649 is an equidigital number, since it uses as much as digits as its factorization.

122538649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 122538649 is about 11069.7176567427. The cubic root of 122538649 is about 496.6964194499.

It can be divided in two parts, 12253 and 8649, that added together give a palindrome (20902).

The spelling of 122538649 in words is "one hundred twenty-two million, five hundred thirty-eight thousand, six hundred forty-nine".