121403629 has 2 divisors, whose sum is σ = 121403630. Its totient is φ = 121403628.

The previous prime is 121403627. The next prime is 121403677. The reversal of 121403629 is 926304121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82628100 + 38775529 = 9090^2 + 6227^2 .

It is an emirp because it is prime and its reverse (926304121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121403629 - 2¹ = 121403627 is a prime.

It is a super-2 number, since 2×121403629² = 29477682268739282, which contains 22 as substring.

Together with 121403627, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121403597 and 121403606.

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 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, 60701814 + 60701815.

It is an arithmetic number, because the mean of its divisors is an integer number (60701815).

Almost surely, 2^121403629 is an apocalyptic number.

It is an amenable number.

121403629 is a deficient number, since it is larger than the sum of its proper divisors (1).

121403629 is an equidigital number, since it uses as much as digits as its factorization.

121403629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 121403629 is about 11018.3314980082. The cubic root of 121403629 is about 495.1581020666.

The spelling of 121403629 in words is "one hundred twenty-one million, four hundred three thousand, six hundred twenty-nine".