121620797 has 2 divisors, whose sum is σ = 121620798. Its totient is φ = 121620796.

The previous prime is 121620787. The next prime is 121620827. The reversal of 121620797 is 797026121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 54479161 = 8194^2 + 7381^2 .

It is an emirp because it is prime and its reverse (797026121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121620797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121620787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60810398 + 60810399.

It is an arithmetic number, because the mean of its divisors is an integer number (60810399).

Almost surely, 2^121620797 is an apocalyptic number.

It is an amenable number.

121620797 is a deficient number, since it is larger than the sum of its proper divisors (1).

121620797 is an equidigital number, since it uses as much as digits as its factorization.

121620797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 121620797 is about 11028.1819444549. The cubic root of 121620797 is about 495.4531740806.

The spelling of 121620797 in words is "one hundred twenty-one million, six hundred twenty thousand, seven hundred ninety-seven".