99961877 has 2 divisors, whose sum is σ = 99961878. Its totient is φ = 99961876.

The previous prime is 99961847. The next prime is 99961891. The reversal of 99961877 is 77816999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94984516 + 4977361 = 9746^2 + 2231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99961877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99961837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49980938 + 49980939.

It is an arithmetic number, because the mean of its divisors is an integer number (49980939).

Almost surely, 2^99961877 is an apocalyptic number.

It is an amenable number.

99961877 is a deficient number, since it is larger than the sum of its proper divisors (1).

99961877 is an equidigital number, since it uses as much as digits as its factorization.

99961877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 56.

The square root of 99961877 is about 9998.0936682950. The cubic root of 99961877 is about 464.0998921005.

The spelling of 99961877 in words is "ninety-nine million, nine hundred sixty-one thousand, eight hundred seventy-seven".