9105765421 has 2 divisors, whose sum is σ = 9105765422. Its totient is φ = 9105765420.

The previous prime is 9105765353. The next prime is 9105765451. The reversal of 9105765421 is 1245675019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6820447396 + 2285318025 = 82586^2 + 47805^2 .

It is a cyclic number.

It is not a de Polignac number, because 9105765421 - 2⁹ = 9105764909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9105765451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4552882710 + 4552882711.

It is an arithmetic number, because the mean of its divisors is an integer number (4552882711).

Almost surely, 2^9105765421 is an apocalyptic number.

It is an amenable number.

9105765421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9105765421 is an equidigital number, since it uses as much as digits as its factorization.

9105765421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 9105765421 is about 95424.1343738574. The cubic root of 9105765421 is about 2088.2002944587.

The spelling of 9105765421 in words is "nine billion, one hundred five million, seven hundred sixty-five thousand, four hundred twenty-one".