97288311 has 4 divisors (see below), whose sum is σ = 129717752. Its totient is φ = 64858872.

The previous prime is 97288309. The next prime is 97288313. The reversal of 97288311 is 11388279.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (97288309) and next prime (97288313).

It is not a de Polignac number, because 97288311 - 2¹ = 97288309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97288311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97288313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16214716 + ... + 16214721.

It is an arithmetic number, because the mean of its divisors is an integer number (32429438).

Almost surely, 2^97288311 is an apocalyptic number.

97288311 is a deficient number, since it is larger than the sum of its proper divisors (32429441).

97288311 is a wasteful number, since it uses less digits than its factorization.

97288311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32429440.

The product of its digits is 24192, while the sum is 39.

The square root of 97288311 is about 9863.4837151992. The cubic root of 97288311 is about 459.9248632791.

The spelling of 97288311 in words is "ninety-seven million, two hundred eighty-eight thousand, three hundred eleven".