121620787 has 2 divisors, whose sum is σ = 121620788. Its totient is φ = 121620786.

The previous prime is 121620773. The next prime is 121620797. The reversal of 121620787 is 787026121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121620787 is a prime.

It is a zygodrome in base 5.

It is not a weakly prime, because it can be changed into another prime (121620797) 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 as a sum of consecutive naturals, namely, 60810393 + 60810394.

It is an arithmetic number, because the mean of its divisors is an integer number (60810394).

Almost surely, 2^121620787 is an apocalyptic number.

121620787 is a deficient number, since it is larger than the sum of its proper divisors (1).

121620787 is an equidigital number, since it uses as much as digits as its factorization.

121620787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 121620787 is about 11028.1814910710. The cubic root of 121620787 is about 495.4531605014.

The spelling of 121620787 in words is "one hundred twenty-one million, six hundred twenty thousand, seven hundred eighty-seven".