117262661 has 4 divisors (see below), whose sum is σ = 123434400. Its totient is φ = 111090924.

The previous prime is 117262643. The next prime is 117262667. The reversal of 117262661 is 166262711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117262661 - 2²² = 113068357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117262667) 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, 3085841 + ... + 3085878.

It is an arithmetic number, because the mean of its divisors is an integer number (30858600).

Almost surely, 2^117262661 is an apocalyptic number.

It is an amenable number.

117262661 is a deficient number, since it is larger than the sum of its proper divisors (6171739).

117262661 is an equidigital number, since it uses as much as digits as its factorization.

117262661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171738.

The product of its digits is 6048, while the sum is 32.

The square root of 117262661 is about 10828.7885287321. The cubic root of 117262661 is about 489.4630533620.

Subtracting 117262661 from its reverse (166262711), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 117262661 in words is "one hundred seventeen million, two hundred sixty-two thousand, six hundred sixty-one".