83777643 has 6 divisors (see below), whose sum is σ = 121012164. Its totient is φ = 55851756.

The previous prime is 83777591. The next prime is 83777651. The reversal of 83777643 is 34677738.

It is not a de Polignac number, because 83777643 - 2¹⁰ = 83776619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83777693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4654305 + ... + 4654322.

It is an arithmetic number, because the mean of its divisors is an integer number (20168694).

Almost surely, 2^83777643 is an apocalyptic number.

83777643 is a deficient number, since it is larger than the sum of its proper divisors (37234521).

83777643 is a wasteful number, since it uses less digits than its factorization.

83777643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308633 (or 9308630 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 83777643 is about 9153.0127826853. The cubic root of 83777643 is about 437.5651372947.

The spelling of 83777643 in words is "eighty-three million, seven hundred seventy-seven thousand, six hundred forty-three".