97870609 has 2 divisors, whose sum is σ = 97870610. Its totient is φ = 97870608.

The previous prime is 97870607. The next prime is 97870613. The reversal of 97870609 is 90607879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96040000 + 1830609 = 9800^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 97870609 - 2¹ = 97870607 is a prime.

It is a super-2 number, since 2×97870609² = 19157312212061762, which contains 22 as substring.

Together with 97870607, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97870601) 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, 48935304 + 48935305.

It is an arithmetic number, because the mean of its divisors is an integer number (48935305).

Almost surely, 2^97870609 is an apocalyptic number.

It is an amenable number.

97870609 is a deficient number, since it is larger than the sum of its proper divisors (1).

97870609 is an equidigital number, since it uses as much as digits as its factorization.

97870609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 97870609 is about 9892.9575456483. The cubic root of 97870609 is about 460.8406320292.

The spelling of 97870609 in words is "ninety-seven million, eight hundred seventy thousand, six hundred nine".