98881777 has 2 divisors, whose sum is σ = 98881778. Its totient is φ = 98881776.

The previous prime is 98881763. The next prime is 98881781. The reversal of 98881777 is 77718889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70408881 + 28472896 = 8391^2 + 5336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98881777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98881787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49440888 + 49440889.

It is an arithmetic number, because the mean of its divisors is an integer number (49440889).

Almost surely, 2^98881777 is an apocalyptic number.

It is an amenable number.

98881777 is a deficient number, since it is larger than the sum of its proper divisors (1).

98881777 is an equidigital number, since it uses as much as digits as its factorization.

98881777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 55.

The square root of 98881777 is about 9943.9316671023. The cubic root of 98881777 is about 462.4222837033.

The spelling of 98881777 in words is "ninety-eight million, eight hundred eighty-one thousand, seven hundred seventy-seven".