98021977 has 2 divisors, whose sum is σ = 98021978. Its totient is φ = 98021976.

The previous prime is 98021971. The next prime is 98021981. The reversal of 98021977 is 77912089.

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., 97831881 + 190096 = 9891^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 98021977 - 2¹⁹ = 97497689 is a prime.

It is a zygodrome in base 9.

It is not a weakly prime, because it can be changed into another prime (98021971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49010988 + 49010989.

It is an arithmetic number, because the mean of its divisors is an integer number (49010989).

Almost surely, 2^98021977 is an apocalyptic number.

It is an amenable number.

98021977 is a deficient number, since it is larger than the sum of its proper divisors (1).

98021977 is an equidigital number, since it uses as much as digits as its factorization.

98021977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 98021977 is about 9900.6048805111. The cubic root of 98021977 is about 461.0780904253.

The spelling of 98021977 in words is "ninety-eight million, twenty-one thousand, nine hundred seventy-seven".