123404402153 has 2 divisors, whose sum is σ = 123404402154. Its totient is φ = 123404402152.

The previous prime is 123404402123. The next prime is 123404402161. The reversal of 123404402153 is 351204404321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68504163289 + 54900238864 = 261733^2 + 234308^2 .

It is a cyclic number.

It is not a de Polignac number, because 123404402153 - 2¹⁰ = 123404401129 is a prime.

It is not a weakly prime, because it can be changed into another prime (123404402123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61702201076 + 61702201077.

It is an arithmetic number, because the mean of its divisors is an integer number (61702201077).

Almost surely, 2^123404402153 is an apocalyptic number.

It is an amenable number.

123404402153 is a deficient number, since it is larger than the sum of its proper divisors (1).

123404402153 is an equidigital number, since it uses as much as digits as its factorization.

123404402153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 123404402153 its reverse (351204404321), we get a palindrome (474608806474).

The spelling of 123404402153 in words is "one hundred twenty-three billion, four hundred four million, four hundred two thousand, one hundred fifty-three".