69938608477 has 4 divisors (see below), whose sum is σ = 69956413020. Its totient is φ = 69920803936.

The previous prime is 69938608469. The next prime is 69938608513. The reversal of 69938608477 is 77480683996.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9949863001 + 59988745476 = 99749^2 + 244926^2 .

It is a cyclic number.

It is not a de Polignac number, because 69938608477 - 2³ = 69938608469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69938608177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8896378 + ... + 8904235.

It is an arithmetic number, because the mean of its divisors is an integer number (17489103255).

Almost surely, 2^69938608477 is an apocalyptic number.

It is an amenable number.

69938608477 is a deficient number, since it is larger than the sum of its proper divisors (17804543).

69938608477 is a wasteful number, since it uses less digits than its factorization.

69938608477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17804542.

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 69938608477 in words is "sixty-nine billion, nine hundred thirty-eight million, six hundred eight thousand, four hundred seventy-seven".