117961969 has 2 divisors, whose sum is σ = 117961970. Its totient is φ = 117961968.

The previous prime is 117961967. The next prime is 117961979. The reversal of 117961969 is 969169711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94342369 + 23619600 = 9713^2 + 4860^2 .

It is a cyclic number.

It is not a de Polignac number, because 117961969 - 2¹ = 117961967 is a prime.

It is a super-2 number, since 2×117961969² = 27830052260713922, which contains 22 as substring.

Together with 117961967, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117961967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58980984 + 58980985.

It is an arithmetic number, because the mean of its divisors is an integer number (58980985).

Almost surely, 2^117961969 is an apocalyptic number.

It is an amenable number.

117961969 is a deficient number, since it is larger than the sum of its proper divisors (1).

117961969 is an equidigital number, since it uses as much as digits as its factorization.

117961969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 49.

The square root of 117961969 is about 10861.0298314663. The cubic root of 117961969 is about 490.4341134113.

The spelling of 117961969 in words is "one hundred seventeen million, nine hundred sixty-one thousand, nine hundred sixty-nine".