97971745 has 8 divisors (see below), whose sum is σ = 120743784. Its totient is φ = 76258944.

The previous prime is 97971739. The next prime is 97971761. The reversal of 97971745 is 54717979.

It can be written as a sum of positive squares in 4 ways, for example, as 42081169 + 55890576 = 6487^2 + 7476^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97971745 - 2⁷ = 97971617 is a prime.

It is a super-3 number, since 3×97971745³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264604 + ... + 264973.

It is an arithmetic number, because the mean of its divisors is an integer number (15092973).

Almost surely, 2^97971745 is an apocalyptic number.

It is an amenable number.

97971745 is a deficient number, since it is larger than the sum of its proper divisors (22772039).

97971745 is a wasteful number, since it uses less digits than its factorization.

97971745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529619.

The product of its digits is 555660, while the sum is 49.

The square root of 97971745 is about 9898.0677407260. The cubic root of 97971745 is about 460.9993161450. Note that the first 3 decimals are identical.

The spelling of 97971745 in words is "ninety-seven million, nine hundred seventy-one thousand, seven hundred forty-five".