97776949 has 2 divisors, whose sum is σ = 97776950. Its totient is φ = 97776948.

The previous prime is 97776901. The next prime is 97776953. The reversal of 97776949 is 94967779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91068849 + 6708100 = 9543^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 97776949 - 2¹³ = 97768757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97776893 and 97776902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97776649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48888474 + 48888475.

It is an arithmetic number, because the mean of its divisors is an integer number (48888475).

Almost surely, 2^97776949 is an apocalyptic number.

It is an amenable number.

97776949 is a deficient number, since it is larger than the sum of its proper divisors (1).

97776949 is an equidigital number, since it uses as much as digits as its factorization.

97776949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6001128, while the sum is 58.

The square root of 97776949 is about 9888.2227422323. Note that the first 3 decimals coincide. The cubic root of 97776949 is about 460.6935803595.

The spelling of 97776949 in words is "ninety-seven million, seven hundred seventy-six thousand, nine hundred forty-nine".