97764791 has 4 divisors (see below), whose sum is σ = 99002400. Its totient is φ = 96527184.

The previous prime is 97764781. The next prime is 97764817. The reversal of 97764791 is 19746779.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97764791 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 (97764721) 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 3 ways as a sum of consecutive naturals, for example, 618686 + ... + 618843.

It is an arithmetic number, because the mean of its divisors is an integer number (24750600).

Almost surely, 2^97764791 is an apocalyptic number.

97764791 is a deficient number, since it is larger than the sum of its proper divisors (1237609).

97764791 is a wasteful number, since it uses less digits than its factorization.

97764791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237608.

The product of its digits is 666792, while the sum is 50.

The square root of 97764791 is about 9887.6079513702. The cubic root of 97764791 is about 460.6744847043.

The spelling of 97764791 in words is "ninety-seven million, seven hundred sixty-four thousand, seven hundred ninety-one".