83890647 has 12 divisors (see below), whose sum is σ = 125663720. Its totient is φ = 55926936.

The previous prime is 83890627. The next prime is 83890657. The reversal of 83890647 is 74609838.

It is a happy number.

It is not a de Polignac number, because 83890647 - 2⁷ = 83890519 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 (83890627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172372 + ... + 172857.

Almost surely, 2^83890647 is an apocalyptic number.

83890647 is a deficient number, since it is larger than the sum of its proper divisors (41773073).

83890647 is an equidigital number, since it uses as much as digits as its factorization.

83890647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345244 (or 345232 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 83890647 is about 9159.1837518416. The cubic root of 83890647 is about 437.7617863987.

It can be divided in two parts, 8 and 3890647, that added together give a triangular number (3890655 = T₂₇₈₉).

The spelling of 83890647 in words is "eighty-three million, eight hundred ninety thousand, six hundred forty-seven".