116961591 has 8 divisors (see below), whose sum is σ = 159575680. Its totient is φ = 76160952.

The previous prime is 116961589. The next prime is 116961599. The reversal of 116961591 is 195169611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 116961591 - 2¹ = 116961589 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 (116961599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453211 + ... + 453468.

It is an arithmetic number, because the mean of its divisors is an integer number (19946960).

Almost surely, 2^116961591 is an apocalyptic number.

116961591 is a deficient number, since it is larger than the sum of its proper divisors (42614089).

116961591 is an equidigital number, since it uses as much as digits as its factorization.

116961591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906725.

The product of its digits is 14580, while the sum is 39.

The square root of 116961591 is about 10814.8782240023. The cubic root of 116961591 is about 489.0437981688.

The spelling of 116961591 in words is "one hundred sixteen million, nine hundred sixty-one thousand, five hundred ninety-one".