116654991 has 4 divisors (see below), whose sum is σ = 155539992. Its totient is φ = 77769992.

The previous prime is 116654983. The next prime is 116655017. The reversal of 116654991 is 199456611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199456611 = 3 ⋅66485537.

It is a cyclic number.

It is not a de Polignac number, because 116654991 - 2³ = 116654983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116654911) 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, 19442496 + ... + 19442501.

It is an arithmetic number, because the mean of its divisors is an integer number (38884998).

Almost surely, 2^116654991 is an apocalyptic number.

116654991 is a deficient number, since it is larger than the sum of its proper divisors (38885001).

116654991 is an equidigital number, since it uses as much as digits as its factorization.

116654991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38885000.

The product of its digits is 58320, while the sum is 42.

The square root of 116654991 is about 10800.6940054795. The cubic root of 116654991 is about 488.6161021040.

The spelling of 116654991 in words is "one hundred sixteen million, six hundred fifty-four thousand, nine hundred ninety-one".