121649029 has 2 divisors, whose sum is σ = 121649030. Its totient is φ = 121649028.

The previous prime is 121648999. The next prime is 121649069. The reversal of 121649029 is 920946121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92736900 + 28912129 = 9630^2 + 5377^2 .

It is a cyclic number.

It is not a de Polignac number, because 121649029 - 2²⁵ = 88094597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121648985 and 121649003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121649069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60824514 + 60824515.

It is an arithmetic number, because the mean of its divisors is an integer number (60824515).

Almost surely, 2^121649029 is an apocalyptic number.

It is an amenable number.

121649029 is a deficient number, since it is larger than the sum of its proper divisors (1).

121649029 is an equidigital number, since it uses as much as digits as its factorization.

121649029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 121649029 is about 11029.4618635725. The cubic root of 121649029 is about 495.4915078529.

The spelling of 121649029 in words is "one hundred twenty-one million, six hundred forty-nine thousand, twenty-nine".