97943977 has 2 divisors, whose sum is σ = 97943978. Its totient is φ = 97943976.

The previous prime is 97943939. The next prime is 97943983. The reversal of 97943977 is 77934979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96353856 + 1590121 = 9816^2 + 1261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97943977 is a prime.

It is not a weakly prime, because it can be changed into another prime (97943927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48971988 + 48971989.

It is an arithmetic number, because the mean of its divisors is an integer number (48971989).

Almost surely, 2^97943977 is an apocalyptic number.

It is an amenable number.

97943977 is a deficient number, since it is larger than the sum of its proper divisors (1).

97943977 is an equidigital number, since it uses as much as digits as its factorization.

97943977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000564, while the sum is 55.

The square root of 97943977 is about 9896.6649433029. The cubic root of 97943977 is about 460.9557585574.

The spelling of 97943977 in words is "ninety-seven million, nine hundred forty-three thousand, nine hundred seventy-seven".