117251977 has 2 divisors, whose sum is σ = 117251978. Its totient is φ = 117251976.

The previous prime is 117251971. The next prime is 117251993. The reversal of 117251977 is 779152711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110754576 + 6497401 = 10524^2 + 2549^2 .

It is an emirp because it is prime and its reverse (779152711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117251977 - 2³ = 117251969 is a prime.

It is a super-2 number, since 2×117251977² = 27496052220817058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117251971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58625988 + 58625989.

It is an arithmetic number, because the mean of its divisors is an integer number (58625989).

Almost surely, 2^117251977 is an apocalyptic number.

It is an amenable number.

117251977 is a deficient number, since it is larger than the sum of its proper divisors (1).

117251977 is an equidigital number, since it uses as much as digits as its factorization.

117251977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30870, while the sum is 40.

The square root of 117251977 is about 10828.2952028470. The cubic root of 117251977 is about 489.4481876407.

The spelling of 117251977 in words is "one hundred seventeen million, two hundred fifty-one thousand, nine hundred seventy-seven".