117919261 has 2 divisors, whose sum is σ = 117919262. Its totient is φ = 117919260.

The previous prime is 117919237. The next prime is 117919273. The reversal of 117919261 is 162919711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80892036 + 37027225 = 8994^2 + 6085^2 .

It is an emirp because it is prime and its reverse (162919711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117919261 - 2¹⁹ = 117394973 is a prime.

It is a super-2 number, since 2×117919261² = 27809904229572242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 117919261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117919231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58959630 + 58959631.

It is an arithmetic number, because the mean of its divisors is an integer number (58959631).

Almost surely, 2^117919261 is an apocalyptic number.

It is an amenable number.

117919261 is a deficient number, since it is larger than the sum of its proper divisors (1).

117919261 is an equidigital number, since it uses as much as digits as its factorization.

117919261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 37.

The square root of 117919261 is about 10859.0635415767. The cubic root of 117919261 is about 490.3749192248.

The spelling of 117919261 in words is "one hundred seventeen million, nine hundred nineteen thousand, two hundred sixty-one".