97209445 has 4 divisors (see below), whose sum is σ = 116651340. Its totient is φ = 77767552.

The previous prime is 97209433. The next prime is 97209461. The reversal of 97209445 is 54490279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54490279 = 811 ⋅67189.

It can be written as a sum of positive squares in 2 ways, for example, as 11498881 + 85710564 = 3391^2 + 9258^2 .

It is a cyclic number.

It is not a de Polignac number, because 97209445 - 2⁷ = 97209317 is a prime.

It is a super-3 number, since 3×97209445³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 97209398 and 97209407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9720940 + ... + 9720949.

It is an arithmetic number, because the mean of its divisors is an integer number (29162835).

Almost surely, 2^97209445 is an apocalyptic number.

It is an amenable number.

97209445 is a deficient number, since it is larger than the sum of its proper divisors (19441895).

97209445 is a wasteful number, since it uses less digits than its factorization.

97209445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19441894.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 97209445 is about 9859.4850271198. The cubic root of 97209445 is about 459.8005515311.

The spelling of 97209445 in words is "ninety-seven million, two hundred nine thousand, four hundred forty-five".