97686877402 has 16 divisors (see below), whose sum is σ = 155155816872. Its totient is φ = 45968496640.

The previous prime is 97686877399. The next prime is 97686877411. The reversal of 97686877402 is 20477868679.

It is a Cunningham number, because it is equal to 312549²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 92932912801 + 4753964601 = 304849^2 + 68949^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299402 + ... + 1372522.

Almost surely, 2^97686877402 is an apocalyptic number.

97686877402 is a deficient number, since it is larger than the sum of its proper divisors (57468939470).

97686877402 is a wasteful number, since it uses less digits than its factorization.

97686877402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112433.

The product of its (nonzero) digits is 56899584, while the sum is 64.

The spelling of 97686877402 in words is "ninety-seven billion, six hundred eighty-six million, eight hundred seventy-seven thousand, four hundred two".