97678937 has 4 divisors (see below), whose sum is σ = 97709796. Its totient is φ = 97648080.

The previous prime is 97678921. The next prime is 97678939. The reversal of 97678937 is 73987679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73987679 = 37 ⋅1999667.

It can be written as a sum of positive squares in 2 ways, for example, as 55636681 + 42042256 = 7459^2 + 6484^2 .

It is a cyclic number.

It is not a de Polignac number, because 97678937 - 2⁴ = 97678921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97678939) 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, 10058 + ... + 17219.

It is an arithmetic number, because the mean of its divisors is an integer number (24427449).

Almost surely, 2^97678937 is an apocalyptic number.

It is an amenable number.

97678937 is a deficient number, since it is larger than the sum of its proper divisors (30859).

97678937 is a wasteful number, since it uses less digits than its factorization.

97678937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30858.

The product of its digits is 4000752, while the sum is 56.

The square root of 97678937 is about 9883.2655028589. The cubic root of 97678937 is about 460.5395952079.

The spelling of 97678937 in words is "ninety-seven million, six hundred seventy-eight thousand, nine hundred thirty-seven".