97770749 has 2 divisors, whose sum is σ = 97770750. Its totient is φ = 97770748.

The previous prime is 97770731. The next prime is 97770779. The reversal of 97770749 is 94707779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63313849 + 34456900 = 7957^2 + 5870^2 .

It is a cyclic number.

It is not a de Polignac number, because 97770749 - 2²⁰ = 96722173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 97770697 and 97770706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97770709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48885374 + 48885375.

It is an arithmetic number, because the mean of its divisors is an integer number (48885375).

Almost surely, 2^97770749 is an apocalyptic number.

It is an amenable number.

97770749 is a deficient number, since it is larger than the sum of its proper divisors (1).

97770749 is an equidigital number, since it uses as much as digits as its factorization.

97770749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777924, while the sum is 50.

The square root of 97770749 is about 9887.9092329976. The cubic root of 97770749 is about 460.6838426841.

The spelling of 97770749 in words is "ninety-seven million, seven hundred seventy thousand, seven hundred forty-nine".