97770609 has 12 divisors (see below), whose sum is σ = 144669252. Its totient is φ = 63590400.

The previous prime is 97770593. The next prime is 97770619. The reversal of 97770609 is 90607779.

It can be written as a sum of positive squares in 2 ways, for example, as 17040384 + 80730225 = 4128^2 + 8985^2 .

It is not a de Polignac number, because 97770609 - 2⁴ = 97770593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97770619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132112 + ... + 132849.

It is an arithmetic number, because the mean of its divisors is an integer number (12055771).

Almost surely, 2^97770609 is an apocalyptic number.

It is an amenable number.

97770609 is a deficient number, since it is larger than the sum of its proper divisors (46898643).

97770609 is a wasteful number, since it uses less digits than its factorization.

97770609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265008 (or 265005 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 97770609 is about 9887.9021536421. The cubic root of 97770609 is about 460.6836227964.

The spelling of 97770609 in words is "ninety-seven million, seven hundred seventy thousand, six hundred nine".