9247735921 has 2 divisors, whose sum is σ = 9247735922. Its totient is φ = 9247735920.

The previous prime is 9247735909. The next prime is 9247735927. The reversal of 9247735921 is 1295377429.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5994630625 + 3253105296 = 77425^2 + 57036^2 .

It is a cyclic number.

It is not a de Polignac number, because 9247735921 - 2³¹ = 7100252273 is a prime.

It is not a weakly prime, because it can be changed into another prime (9247735927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4623867960 + 4623867961.

It is an arithmetic number, because the mean of its divisors is an integer number (4623867961).

Almost surely, 2^9247735921 is an apocalyptic number.

It is an amenable number.

9247735921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9247735921 is an equidigital number, since it uses as much as digits as its factorization.

9247735921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The square root of 9247735921 is about 96165.1492017768. The cubic root of 9247735921 is about 2098.9969450838.

The spelling of 9247735921 in words is "nine billion, two hundred forty-seven million, seven hundred thirty-five thousand, nine hundred twenty-one".