153121109 has 2 divisors, whose sum is σ = 153121110. Its totient is φ = 153121108.

The previous prime is 153121099. The next prime is 153121153. The reversal of 153121109 is 901121351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80820100 + 72301009 = 8990^2 + 8503^2 .

It is a cyclic number.

It is not a de Polignac number, because 153121109 - 2⁴ = 153121093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153121169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76560554 + 76560555.

It is an arithmetic number, because the mean of its divisors is an integer number (76560555).

Almost surely, 2^153121109 is an apocalyptic number.

It is an amenable number.

153121109 is a deficient number, since it is larger than the sum of its proper divisors (1).

153121109 is an equidigital number, since it uses as much as digits as its factorization.

153121109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 153121109 is about 12374.2114496238. The cubic root of 153121109 is about 534.9892087380.

The spelling of 153121109 in words is "one hundred fifty-three million, one hundred twenty-one thousand, one hundred nine".