117154649 has 2 divisors, whose sum is σ = 117154650. Its totient is φ = 117154648.

The previous prime is 117154643. The next prime is 117154651. The reversal of 117154649 is 946451711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 42159049 = 8660^2 + 6493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117154649 is a prime.

Together with 117154651, 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 (117154643) 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, 58577324 + 58577325.

It is an arithmetic number, because the mean of its divisors is an integer number (58577325).

Almost surely, 2^117154649 is an apocalyptic number.

It is an amenable number.

117154649 is a deficient number, since it is larger than the sum of its proper divisors (1).

117154649 is an equidigital number, since it uses as much as digits as its factorization.

117154649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 117154649 is about 10823.8001182579. The cubic root of 117154649 is about 489.3127238266.

It can be divided in two parts, 117154 and 649, that multiplied together give a triangular number (76032946 = T₁₂₃₃₁).

The spelling of 117154649 in words is "one hundred seventeen million, one hundred fifty-four thousand, six hundred forty-nine".