117900209951 has 2 divisors, whose sum is σ = 117900209952. Its totient is φ = 117900209950.

The previous prime is 117900209923. The next prime is 117900209983. The reversal of 117900209951 is 159902009711.

It is a weak prime.

It is an emirp because it is prime and its reverse (159902009711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117900209951 - 2¹⁸ = 117899947807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117900209351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58950104975 + 58950104976.

It is an arithmetic number, because the mean of its divisors is an integer number (58950104976).

Almost surely, 2^117900209951 is an apocalyptic number.

117900209951 is a deficient number, since it is larger than the sum of its proper divisors (1).

117900209951 is an equidigital number, since it uses as much as digits as its factorization.

117900209951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 44.

The spelling of 117900209951 in words is "one hundred seventeen billion, nine hundred million, two hundred nine thousand, nine hundred fifty-one".