117151997 has 2 divisors, whose sum is σ = 117151998. Its totient is φ = 117151996.

The previous prime is 117151973. The next prime is 117152017. The reversal of 117151997 is 799151711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113507716 + 3644281 = 10654^2 + 1909^2 .

It is an emirp because it is prime and its reverse (799151711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117151997 - 2¹⁸ = 116889853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117151297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58575998 + 58575999.

It is an arithmetic number, because the mean of its divisors is an integer number (58575999).

Almost surely, 2^117151997 is an apocalyptic number.

It is an amenable number.

117151997 is a deficient number, since it is larger than the sum of its proper divisors (1).

117151997 is an equidigital number, since it uses as much as digits as its factorization.

117151997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19845, while the sum is 41.

The square root of 117151997 is about 10823.6776097591. The cubic root of 117151997 is about 489.3090316495.

The spelling of 117151997 in words is "one hundred seventeen million, one hundred fifty-one thousand, nine hundred ninety-seven".