97749 has 6 divisors (see below), whose sum is σ = 141206. Its totient is φ = 65160.

The previous prime is 97729. The next prime is 97771. The reversal of 97749 is 94779.

It can be written as a sum of positive squares in only one way, i.e., 79524 + 18225 = 282^2 + 135^2 .

It is not a de Polignac number, because 97749 - 2¹¹ = 95701 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5422 + ... + 5439.

2⁹⁷⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

97749 is a deficient number, since it is larger than the sum of its proper divisors (43457).

97749 is a wasteful number, since it uses less digits than its factorization.

97749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10867 (or 10864 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 97749 is about 312.6483647806. The cubic root of 97749 is about 46.0649680606.

The spelling of 97749 in words is "ninety-seven thousand, seven hundred forty-nine".