117542993 has 2 divisors, whose sum is σ = 117542994. Its totient is φ = 117542992.

The previous prime is 117542989. The next prime is 117543001. The reversal of 117542993 is 399245711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94809169 + 22733824 = 9737^2 + 4768^2 .

It is a cyclic number.

It is not a de Polignac number, because 117542993 - 2² = 117542989 is a prime.

It is equal to p_6709595 and since 117542993 and 6709595 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117542993.

It is not a weakly prime, because it can be changed into another prime (117542933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58771496 + 58771497.

It is an arithmetic number, because the mean of its divisors is an integer number (58771497).

Almost surely, 2^117542993 is an apocalyptic number.

It is an amenable number.

117542993 is a deficient number, since it is larger than the sum of its proper divisors (1).

117542993 is an equidigital number, since it uses as much as digits as its factorization.

117542993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 117542993 is about 10841.7246321791. The cubic root of 117542993 is about 489.8527851521.

The spelling of 117542993 in words is "one hundred seventeen million, five hundred forty-two thousand, nine hundred ninety-three".