116897781 has 96 divisors (see below), whose sum is σ = 218792448. Its totient is φ = 54552960.

The previous prime is 116897761. The next prime is 116897783. The reversal of 116897781 is 187798611.

116897781 = T₁₅₃ + T₁₅₄ + ... + T₈₈₉.

It is not a de Polignac number, because 116897781 - 2⁶ = 116897717 is a prime.

It is a super-2 number, since 2×116897781² = 27330182405447922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 116897781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116897783) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1408366 + ... + 1408448.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^116897781 is an apocalyptic number.

116897781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

116897781 is a deficient number, since it is larger than the sum of its proper divisors (101894667).

116897781 is a wasteful number, since it uses less digits than its factorization.

116897781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 184 counting only the distinct ones).

The product of its digits is 169344, while the sum is 48.

The square root of 116897781 is about 10811.9277189593. The cubic root of 116897781 is about 488.9548471404.

The spelling of 116897781 in words is "one hundred sixteen million, eight hundred ninety-seven thousand, seven hundred eighty-one".