97280309 has 4 divisors (see below), whose sum is σ = 111177504. Its totient is φ = 83383116.

The previous prime is 97280291. The next prime is 97280327. The reversal of 97280309 is 90308279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (97280291) and next prime (97280327).

It is a cyclic number.

It is not a de Polignac number, because 97280309 - 2¹² = 97276213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97280329) 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 in 3 ways as a sum of consecutive naturals, for example, 6948587 + ... + 6948600.

It is an arithmetic number, because the mean of its divisors is an integer number (27794376).

Almost surely, 2^97280309 is an apocalyptic number.

It is an amenable number.

97280309 is a deficient number, since it is larger than the sum of its proper divisors (13897195).

97280309 is a wasteful number, since it uses less digits than its factorization.

97280309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13897194.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 97280309 is about 9863.0780692439. The cubic root of 97280309 is about 459.9122532693.

The spelling of 97280309 in words is "ninety-seven million, two hundred eighty thousand, three hundred nine".