117481651 has 4 divisors (see below), whose sum is σ = 134264752. Its totient is φ = 100698552.

The previous prime is 117481627. The next prime is 117481657. The reversal of 117481651 is 156184711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156184711 = 191 ⋅817721.

It is a cyclic number.

It is not a de Polignac number, because 117481651 - 2¹³ = 117473459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117481657) 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, 8391540 + ... + 8391553.

It is an arithmetic number, because the mean of its divisors is an integer number (33566188).

Almost surely, 2^117481651 is an apocalyptic number.

117481651 is a deficient number, since it is larger than the sum of its proper divisors (16783101).

117481651 is an equidigital number, since it uses as much as digits as its factorization.

117481651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16783100.

The product of its digits is 6720, while the sum is 34.

The square root of 117481651 is about 10838.8952850371. The cubic root of 117481651 is about 489.7675573915.

The spelling of 117481651 in words is "one hundred seventeen million, four hundred eighty-one thousand, six hundred fifty-one".