121770647 has 2 divisors, whose sum is σ = 121770648. Its totient is φ = 121770646.

The previous prime is 121770581. The next prime is 121770653. The reversal of 121770647 is 746077121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121770647 - 2²⁴ = 104993431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121770247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60885323 + 60885324.

It is an arithmetic number, because the mean of its divisors is an integer number (60885324).

Almost surely, 2^121770647 is an apocalyptic number.

121770647 is a deficient number, since it is larger than the sum of its proper divisors (1).

121770647 is an equidigital number, since it uses as much as digits as its factorization.

121770647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 121770647 is about 11034.9738105716. The cubic root of 121770647 is about 495.6565745646.

The spelling of 121770647 in words is "one hundred twenty-one million, seven hundred seventy thousand, six hundred forty-seven".