117122987 has 2 divisors, whose sum is σ = 117122988. Its totient is φ = 117122986.

The previous prime is 117122983. The next prime is 117123023. The reversal of 117122987 is 789221711.

It is a weak prime.

It is an emirp because it is prime and its reverse (789221711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117122987 - 2² = 117122983 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117122987.

It is not a weakly prime, because it can be changed into another prime (117122983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58561493 + 58561494.

It is an arithmetic number, because the mean of its divisors is an integer number (58561494).

Almost surely, 2^117122987 is an apocalyptic number.

117122987 is a deficient number, since it is larger than the sum of its proper divisors (1).

117122987 is an equidigital number, since it uses as much as digits as its factorization.

117122987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 38.

The square root of 117122987 is about 10822.3374092661. The cubic root of 117122987 is about 489.2686396027.

The spelling of 117122987 in words is "one hundred seventeen million, one hundred twenty-two thousand, nine hundred eighty-seven".