90909155123 has 2 divisors, whose sum is σ = 90909155124. Its totient is φ = 90909155122.

The previous prime is 90909155101. The next prime is 90909155167. The reversal of 90909155123 is 32155190909.

It is an a-pointer prime, because the next prime (90909155167) can be obtained adding 90909155123 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90909155123 - 2²⁰ = 90908106547 is a prime.

It is not a weakly prime, because it can be changed into another prime (90909155173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45454577561 + 45454577562.

It is an arithmetic number, because the mean of its divisors is an integer number (45454577562).

Almost surely, 2^90909155123 is an apocalyptic number.

90909155123 is a deficient number, since it is larger than the sum of its proper divisors (1).

90909155123 is an equidigital number, since it uses as much as digits as its factorization.

90909155123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109350, while the sum is 44.

The spelling of 90909155123 in words is "ninety billion, nine hundred nine million, one hundred fifty-five thousand, one hundred twenty-three".