97278723 has 6 divisors (see below), whose sum is σ = 140513724. Its totient is φ = 64852476.

The previous prime is 97278721. The next prime is 97278763. The reversal of 97278723 is 32787279.

It is not a de Polignac number, because 97278723 - 2¹ = 97278721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97278721) 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 5 ways as a sum of consecutive naturals, for example, 5404365 + ... + 5404382.

It is an arithmetic number, because the mean of its divisors is an integer number (23418954).

Almost surely, 2^97278723 is an apocalyptic number.

97278723 is a deficient number, since it is larger than the sum of its proper divisors (43235001).

97278723 is a wasteful number, since it uses less digits than its factorization.

97278723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10808753 (or 10808750 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 97278723 is about 9862.9976680520. The cubic root of 97278723 is about 459.9097538776.

The spelling of 97278723 in words is "ninety-seven million, two hundred seventy-eight thousand, seven hundred twenty-three".