97175778409 has 4 divisors (see below), whose sum is σ = 99009283716. Its totient is φ = 95342273104.

The previous prime is 97175778383. The next prime is 97175778421. The reversal of 97175778409 is 90487757179.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89283232809 + 7892545600 = 298803^2 + 88840^2 .

It is a cyclic number.

It is not a de Polignac number, because 97175778409 - 2¹⁷ = 97175647337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97175778439) 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, 916752574 + ... + 916752679.

It is an arithmetic number, because the mean of its divisors is an integer number (24752320929).

Almost surely, 2^97175778409 is an apocalyptic number.

It is an amenable number.

97175778409 is a deficient number, since it is larger than the sum of its proper divisors (1833505307).

97175778409 is a wasteful number, since it uses less digits than its factorization.

97175778409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833505306.

The product of its (nonzero) digits is 31116960, while the sum is 64.

The spelling of 97175778409 in words is "ninety-seven billion, one hundred seventy-five million, seven hundred seventy-eight thousand, four hundred nine".