97561973 has 4 divisors (see below), whose sum is σ = 97817088. Its totient is φ = 97306860.

The previous prime is 97561967. The next prime is 97561999. The reversal of 97561973 is 37916579.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 97561973 - 2⁴ = 97561957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97561073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126983 + ... + 127748.

It is an arithmetic number, because the mean of its divisors is an integer number (24454272).

Almost surely, 2^97561973 is an apocalyptic number.

It is an amenable number.

97561973 is a deficient number, since it is larger than the sum of its proper divisors (255115).

97561973 is a wasteful number, since it uses less digits than its factorization.

97561973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255114.

The product of its digits is 357210, while the sum is 47.

The square root of 97561973 is about 9877.3464553999. The cubic root of 97561973 is about 460.3556999905.

The spelling of 97561973 in words is "ninety-seven million, five hundred sixty-one thousand, nine hundred seventy-three".