83947387 has 2 divisors, whose sum is σ = 83947388. Its totient is φ = 83947386.

The previous prime is 83947379. The next prime is 83947397. The reversal of 83947387 is 78374938.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83947387 - 2³ = 83947379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83947387.

It is not a weakly prime, because it can be changed into another prime (83947397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41973693 + 41973694.

It is an arithmetic number, because the mean of its divisors is an integer number (41973694).

Almost surely, 2^83947387 is an apocalyptic number.

83947387 is a deficient number, since it is larger than the sum of its proper divisors (1).

83947387 is an equidigital number, since it uses as much as digits as its factorization.

83947387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 83947387 is about 9162.2806658604. The cubic root of 83947387 is about 437.8604585266.

The spelling of 83947387 in words is "eighty-three million, nine hundred forty-seven thousand, three hundred eighty-seven".