97919440217 has 4 divisors (see below), whose sum is σ = 97928331216. Its totient is φ = 97910549220.

The previous prime is 97919440183. The next prime is 97919440219. The reversal of 97919440217 is 71204491979.

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 a de Polignac number, because none of the positive numbers 2^k-97919440217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97919440219) 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, 4428959 + ... + 4451012.

It is an arithmetic number, because the mean of its divisors is an integer number (24482082804).

Almost surely, 2^97919440217 is an apocalyptic number.

It is an amenable number.

97919440217 is a deficient number, since it is larger than the sum of its proper divisors (8890999).

97919440217 is a wasteful number, since it uses less digits than its factorization.

97919440217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890998.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 97919440217 in words is "ninety-seven billion, nine hundred nineteen million, four hundred forty thousand, two hundred seventeen".