121403677 has 2 divisors, whose sum is σ = 121403678. Its totient is φ = 121403676.

The previous prime is 121403629. The next prime is 121403687. The reversal of 121403677 is 776304121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121308196 + 95481 = 11014^2 + 309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121403677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121403627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60701838 + 60701839.

It is an arithmetic number, because the mean of its divisors is an integer number (60701839).

Almost surely, 2^121403677 is an apocalyptic number.

It is an amenable number.

121403677 is a deficient number, since it is larger than the sum of its proper divisors (1).

121403677 is an equidigital number, since it uses as much as digits as its factorization.

121403677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 121403677 is about 11018.3336761962. Note that the first 3 decimals coincide. The cubic root of 121403677 is about 495.1581673243.

Adding to 121403677 its reverse (776304121), we get a palindrome (897707798).

The spelling of 121403677 in words is "one hundred twenty-one million, four hundred three thousand, six hundred seventy-seven".