116021391 has 16 divisors (see below), whose sum is σ = 163065600. Its totient is φ = 73173888.

The previous prime is 116021387. The next prime is 116021393. The reversal of 116021391 is 193120611.

It is not a de Polignac number, because 116021391 - 2² = 116021387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116021393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77175 + ... + 78663.

It is an arithmetic number, because the mean of its divisors is an integer number (10191600).

Almost surely, 2^116021391 is an apocalyptic number.

116021391 is a deficient number, since it is larger than the sum of its proper divisors (47044209).

116021391 is a wasteful number, since it uses less digits than its factorization.

116021391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 116021391 is about 10771.3226207370. The cubic root of 116021391 is about 487.7298723926.

The spelling of 116021391 in words is "one hundred sixteen million, twenty-one thousand, three hundred ninety-one".