9436717921 has 2 divisors, whose sum is σ = 9436717922. Its totient is φ = 9436717920.

The previous prime is 9436717883. The next prime is 9436717937. The reversal of 9436717921 is 1297176349.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7891834896 + 1544883025 = 88836^2 + 39305^2 .

It is a cyclic number.

It is not a de Polignac number, because 9436717921 - 2¹³ = 9436709729 is a prime.

It is not a weakly prime, because it can be changed into another prime (9436717021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4718358960 + 4718358961.

It is an arithmetic number, because the mean of its divisors is an integer number (4718358961).

Almost surely, 2^9436717921 is an apocalyptic number.

It is an amenable number.

9436717921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9436717921 is an equidigital number, since it uses as much as digits as its factorization.

9436717921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 9436717921 is about 97142.7708118314. The cubic root of 9436717921 is about 2113.1986496087.

The spelling of 9436717921 in words is "nine billion, four hundred thirty-six million, seven hundred seventeen thousand, nine hundred twenty-one".