97561409 has 8 divisors (see below), whose sum is σ = 112032480. Its totient is φ = 84024000.

The previous prime is 97561391. The next prime is 97561411. The reversal of 97561409 is 90416579.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97561409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97561439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233192 + ... + 233609.

It is an arithmetic number, because the mean of its divisors is an integer number (14004060).

Almost surely, 2^97561409 is an apocalyptic number.

It is an amenable number.

97561409 is a deficient number, since it is larger than the sum of its proper divisors (14471071).

97561409 is a wasteful number, since it uses less digits than its factorization.

97561409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466831.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 97561409 is about 9877.3179051805. The cubic root of 97561409 is about 460.3548128924.

The spelling of 97561409 in words is "ninety-seven million, five hundred sixty-one thousand, four hundred nine".