97219791 has 16 divisors (see below), whose sum is σ = 144587520. Its totient is φ = 64562040.

The previous prime is 97219783. The next prime is 97219799. The reversal of 97219791 is 19791279.

It is an interprime number because it is at equal distance from previous prime (97219783) and next prime (97219799).

It is not a de Polignac number, because 97219791 - 2³ = 97219783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97219799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (9036720).

Almost surely, 2^97219791 is an apocalyptic number.

97219791 is a deficient number, since it is larger than the sum of its proper divisors (47367729).

97219791 is a wasteful number, since it uses less digits than its factorization.

97219791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13963 (or 13957 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 97219791 is about 9860.0096855936. The cubic root of 97219791 is about 459.8168631414.

The spelling of 97219791 in words is "ninety-seven million, two hundred nineteen thousand, seven hundred ninety-one".