9249999961 has 2 divisors, whose sum is σ = 9249999962. Its totient is φ = 9249999960.

The previous prime is 9249999949. The next prime is 9249999971. The reversal of 9249999961 is 1699999429.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7353920025 + 1896079936 = 85755^2 + 43544^2 .

It is a cyclic number.

It is not a de Polignac number, because 9249999961 - 2¹³ = 9249991769 is a prime.

It is not a weakly prime, because it can be changed into another prime (9249999901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4624999980 + 4624999981.

It is an arithmetic number, because the mean of its divisors is an integer number (4624999981).

Almost surely, 2^9249999961 is an apocalyptic number.

It is an amenable number.

9249999961 is a deficient number, since it is larger than the sum of its proper divisors (1).

9249999961 is an equidigital number, since it uses as much as digits as its factorization.

9249999961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25509168, while the sum is 67.

The square root of 9249999961 is about 96176.9201056054. The cubic root of 9249999961 is about 2099.1682239540.

The spelling of 9249999961 in words is "nine billion, two hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred sixty-one".