9312120887 has 2 divisors, whose sum is σ = 9312120888. Its totient is φ = 9312120886.

The previous prime is 9312120877. The next prime is 9312120967. The reversal of 9312120887 is 7880212139.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9312120887 - 2⁴ = 9312120871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9312120877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4656060443 + 4656060444.

It is an arithmetic number, because the mean of its divisors is an integer number (4656060444).

Almost surely, 2^9312120887 is an apocalyptic number.

9312120887 is a deficient number, since it is larger than the sum of its proper divisors (1).

9312120887 is an equidigital number, since it uses as much as digits as its factorization.

9312120887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 9312120887 is about 96499.3310184065. The cubic root of 9312120887 is about 2103.8569245399.

The spelling of 9312120887 in words is "nine billion, three hundred twelve million, one hundred twenty thousand, eight hundred eighty-seven".