83780143 has 4 divisors (see below), whose sum is σ = 83869560. Its totient is φ = 83690728.

The previous prime is 83780119. The next prime is 83780149. The reversal of 83780143 is 34108738.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83780143 - 2⁵ = 83780111 is a prime.

It is a super-2 number, since 2×83780143² = 14038224722200898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83780099 and 83780108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83780149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43288 + ... + 45181.

It is an arithmetic number, because the mean of its divisors is an integer number (20967390).

Almost surely, 2^83780143 is an apocalyptic number.

83780143 is a deficient number, since it is larger than the sum of its proper divisors (89417).

83780143 is an equidigital number, since it uses as much as digits as its factorization.

83780143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89416.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 83780143 is about 9153.1493487215. The cubic root of 83780143 is about 437.5694896968.

The spelling of 83780143 in words is "eighty-three million, seven hundred eighty thousand, one hundred forty-three".