97097791 has 16 divisors (see below), whose sum is σ = 112978944. Its totient is φ = 81733824.

The previous prime is 97097783. The next prime is 97097801. The reversal of 97097791 is 19779079.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 97097791 - 2³ = 97097783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97097701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98286 + ... + 99268.

It is an arithmetic number, because the mean of its divisors is an integer number (7061184).

Almost surely, 2^97097791 is an apocalyptic number.

97097791 is a deficient number, since it is larger than the sum of its proper divisors (15881153).

97097791 is a wasteful number, since it uses less digits than its factorization.

97097791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 250047, while the sum is 49.

The square root of 97097791 is about 9853.8211370006. The cubic root of 97097791 is about 459.6244429955.

The spelling of 97097791 in words is "ninety-seven million, ninety-seven thousand, seven hundred ninety-one".