97693409 has 4 divisors (see below), whose sum is σ = 106574640. Its totient is φ = 88812180.

The previous prime is 97693403. The next prime is 97693411. The reversal of 97693409 is 90439679.

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 a de Polignac number, because none of the positive numbers 2^k-97693409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97693403) 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, 4440599 + ... + 4440620.

It is an arithmetic number, because the mean of its divisors is an integer number (26643660).

Almost surely, 2^97693409 is an apocalyptic number.

It is an amenable number.

97693409 is a deficient number, since it is larger than the sum of its proper divisors (8881231).

97693409 is a wasteful number, since it uses less digits than its factorization.

97693409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8881230.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 97693409 is about 9883.9976224198. The cubic root of 97693409 is about 460.5623384253.

Adding to 97693409 its sum of digits (47), we get a square (97693456 = 9884²).

The spelling of 97693409 in words is "ninety-seven million, six hundred ninety-three thousand, four hundred nine".