117943388957887 has 4 divisors (see below), whose sum is σ = 117944570464560. Its totient is φ = 117942207451216.

The previous prime is 117943388957861. The next prime is 117943388957893. The reversal of 117943388957887 is 788759883349711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117943388957887 is a prime.

It is a super-2 number, since 2×117943388957887² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117943388957798 and 117943388957807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117943388987887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590603587 + ... + 590803252.

It is an arithmetic number, because the mean of its divisors is an integer number (29486142616140).

Almost surely, 2^{117943388957887} is an apocalyptic number.

117943388957887 is a deficient number, since it is larger than the sum of its proper divisors (1181506673).

117943388957887 is an equidigital number, since it uses as much as digits as its factorization.

117943388957887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181506672.

The product of its digits is 20483850240, while the sum is 88.

The spelling of 117943388957887 in words is "one hundred seventeen trillion, nine hundred forty-three billion, three hundred eighty-eight million, nine hundred fifty-seven thousand, eight hundred eighty-seven".