120061649 has 2 divisors, whose sum is σ = 120061650. Its totient is φ = 120061648.

The previous prime is 120061561. The next prime is 120061651. The reversal of 120061649 is 946160021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80874049 + 39187600 = 8993^2 + 6260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120061649 is a prime.

Together with 120061651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120081649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60030824 + 60030825.

It is an arithmetic number, because the mean of its divisors is an integer number (60030825).

Almost surely, 2^120061649 is an apocalyptic number.

It is an amenable number.

120061649 is a deficient number, since it is larger than the sum of its proper divisors (1).

120061649 is an equidigital number, since it uses as much as digits as its factorization.

120061649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 120061649 is about 10957.2646677900. The cubic root of 120061649 is about 493.3268667990.

The spelling of 120061649 in words is "one hundred twenty million, sixty-one thousand, six hundred forty-nine".