121678047 has 6 divisors (see below), whose sum is σ = 175757192. Its totient is φ = 81118692.

The previous prime is 121678043. The next prime is 121678093. The reversal of 121678047 is 740876121.

It is not a de Polignac number, because 121678047 - 2² = 121678043 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 (121678043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6759883 + ... + 6759900.

Almost surely, 2^121678047 is an apocalyptic number.

121678047 is a deficient number, since it is larger than the sum of its proper divisors (54079145).

121678047 is a wasteful number, since it uses less digits than its factorization.

121678047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13519789 (or 13519786 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 121678047 is about 11030.7772618252. Note that the first 3 decimals coincide. The cubic root of 121678047 is about 495.5309026858.

The spelling of 121678047 in words is "one hundred twenty-one million, six hundred seventy-eight thousand, forty-seven".