97789643 has 8 divisors (see below), whose sum is σ = 114040800. Its totient is φ = 83819400.

The previous prime is 97789639. The next prime is 97789673. The reversal of 97789643 is 34698779.

It is not a de Polignac number, because 97789643 - 2² = 97789639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97789613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142208 + ... + 142893.

It is an arithmetic number, because the mean of its divisors is an integer number (14255100).

Almost surely, 2^97789643 is an apocalyptic number.

97789643 is a deficient number, since it is larger than the sum of its proper divisors (16251157).

97789643 is an equidigital number, since it uses as much as digits as its factorization.

97789643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285122 (or 285108 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 53.

The square root of 97789643 is about 9888.8645961000. The cubic root of 97789643 is about 460.7135161805.

The spelling of 97789643 in words is "ninety-seven million, seven hundred eighty-nine thousand, six hundred forty-three".