97820769 has 4 divisors (see below), whose sum is σ = 130427696. Its totient is φ = 65213844.

The previous prime is 97820719. The next prime is 97820777. The reversal of 97820769 is 96702879.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 97820769 - 2⁷ = 97820641 is a prime.

It is a super-2 number, since 2×97820769² = 19137805695502722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97820719) 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, 16303459 + ... + 16303464.

It is an arithmetic number, because the mean of its divisors is an integer number (32606924).

Almost surely, 2^97820769 is an apocalyptic number.

It is an amenable number.

97820769 is a deficient number, since it is larger than the sum of its proper divisors (32606927).

97820769 is a wasteful number, since it uses less digits than its factorization.

97820769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32606926.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 97820769 is about 9890.4382612703. The cubic root of 97820769 is about 460.7623920030.

It can be divided in two parts, 97820 and 769, that added together give a palindrome (98589).

The spelling of 97820769 in words is "ninety-seven million, eight hundred twenty thousand, seven hundred sixty-nine".