99847961 has 2 divisors, whose sum is σ = 99847962. Its totient is φ = 99847960.

The previous prime is 99847927. The next prime is 99847967. The reversal of 99847961 is 16974899.

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., 73633561 + 26214400 = 8581^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 99847961 - 2⁶ = 99847897 is a prime.

It is a super-3 number, since 3×99847961³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99847967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49923980 + 49923981.

It is an arithmetic number, because the mean of its divisors is an integer number (49923981).

Almost surely, 2^99847961 is an apocalyptic number.

It is an amenable number.

99847961 is a deficient number, since it is larger than the sum of its proper divisors (1).

99847961 is an equidigital number, since it uses as much as digits as its factorization.

99847961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 99847961 is about 9992.3951583192. The cubic root of 99847961 is about 463.9235298697.

The spelling of 99847961 in words is "ninety-nine million, eight hundred forty-seven thousand, nine hundred sixty-one".