97784387 has 4 divisors (see below), whose sum is σ = 97818120. Its totient is φ = 97750656.

The previous prime is 97784381. The next prime is 97784413. The reversal of 97784387 is 78348779.

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 97784387 - 2⁴ = 97784371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97784381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12062 + ... + 18467.

It is an arithmetic number, because the mean of its divisors is an integer number (24454530).

Almost surely, 2^97784387 is an apocalyptic number.

97784387 is a deficient number, since it is larger than the sum of its proper divisors (33733).

97784387 is a wasteful number, since it uses less digits than its factorization.

97784387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33732.

The product of its digits is 2370816, while the sum is 53.

The square root of 97784387 is about 9888.5988390671. The cubic root of 97784387 is about 460.7052618857.

The spelling of 97784387 in words is "ninety-seven million, seven hundred eighty-four thousand, three hundred eighty-seven".