97809319 has 4 divisors (see below), whose sum is σ = 97839040. Its totient is φ = 97779600.

The previous prime is 97809311. The next prime is 97809329. The reversal of 97809319 is 91390879.

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

It is a cyclic number.

It is not a de Polignac number, because 97809319 - 2³ = 97809311 is a prime.

It is a super-2 number, since 2×97809319² = 19133325766487522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97809311) 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, 9207 + ... + 16744.

It is an arithmetic number, because the mean of its divisors is an integer number (24459760).

Almost surely, 2^97809319 is an apocalyptic number.

97809319 is a deficient number, since it is larger than the sum of its proper divisors (29721).

97809319 is a wasteful number, since it uses less digits than its factorization.

97809319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29720.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 97809319 is about 9889.8594024384. The cubic root of 97809319 is about 460.7444137648.

The spelling of 97809319 in words is "ninety-seven million, eight hundred nine thousand, three hundred nineteen".