83400655 has 24 divisors (see below), whose sum is σ = 109097280. Its totient is φ = 61176960.

The previous prime is 83400643. The next prime is 83400659. The reversal of 83400655 is 55600438.

It is not a de Polignac number, because 83400655 - 2¹⁷ = 83269583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83400659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193290 + ... + 193720.

It is an arithmetic number, because the mean of its divisors is an integer number (4545720).

Almost surely, 2^83400655 is an apocalyptic number.

83400655 is a deficient number, since it is larger than the sum of its proper divisors (25696625).

83400655 is a wasteful number, since it uses less digits than its factorization.

83400655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 83400655 is about 9132.3959068801. The cubic root of 83400655 is about 436.9078224941.

The spelling of 83400655 in words is "eighty-three million, four hundred thousand, six hundred fifty-five".