97775729 has 4 divisors (see below), whose sum is σ = 102921840. Its totient is φ = 92629620.

The previous prime is 97775723. The next prime is 97775731. The reversal of 97775729 is 92757779.

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 a cyclic number.

It is not a de Polignac number, because 97775729 - 2¹² = 97771633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97775723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573027 + ... + 2573064.

It is an arithmetic number, because the mean of its divisors is an integer number (25730460).

Almost surely, 2^97775729 is an apocalyptic number.

It is an amenable number.

97775729 is a deficient number, since it is larger than the sum of its proper divisors (5146111).

97775729 is a wasteful number, since it uses less digits than its factorization.

97775729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146110.

The product of its digits is 1944810, while the sum is 53.

The square root of 97775729 is about 9888.1610524910. The cubic root of 97775729 is about 460.6916642688.

The spelling of 97775729 in words is "ninety-seven million, seven hundred seventy-five thousand, seven hundred twenty-nine".