97440561 has 12 divisors (see below), whose sum is σ = 140895300. Its totient is φ = 64892160.

The previous prime is 97440557. The next prime is 97440571. The reversal of 97440561 is 16504479.

97440561 is a `hidden beast` number, since 97 + 4 + 4 + 0 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 73616400 + 23824161 = 8580^2 + 4881^2 .

It is not a de Polignac number, because 97440561 - 2² = 97440557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97440571) 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, 4281 + ... + 14601.

It is an arithmetic number, because the mean of its divisors is an integer number (11741275).

Almost surely, 2^97440561 is an apocalyptic number.

It is an amenable number.

97440561 is a deficient number, since it is larger than the sum of its proper divisors (43454739).

97440561 is a wasteful number, since it uses less digits than its factorization.

97440561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11376 (or 11373 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 97440561 is about 9871.1985594456. The cubic root of 97440561 is about 460.1646559256.

The spelling of 97440561 in words is "ninety-seven million, four hundred forty thousand, five hundred sixty-one".