97690121 has 4 divisors (see below), whose sum is σ = 97709892. Its totient is φ = 97670352.

The previous prime is 97690091. The next prime is 97690123. The reversal of 97690121 is 12109679.

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 60918025 + 36772096 = 7805^2 + 6064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97690121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97690123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4715 + ... + 14751.

It is an arithmetic number, because the mean of its divisors is an integer number (24427473).

Almost surely, 2^97690121 is an apocalyptic number.

It is an amenable number.

97690121 is a deficient number, since it is larger than the sum of its proper divisors (19771).

97690121 is a wasteful number, since it uses less digits than its factorization.

97690121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19770.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 97690121 is about 9883.8312915590. The cubic root of 97690121 is about 460.5571714238.

The spelling of 97690121 in words is "ninety-seven million, six hundred ninety thousand, one hundred twenty-one".