83144279 has 2 divisors, whose sum is σ = 83144280. Its totient is φ = 83144278.

The previous prime is 83144267. The next prime is 83144293. The reversal of 83144279 is 97244138.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83144279 is a prime.

It is a super-2 number, since 2×83144279² = 13825942260859682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83144239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41572139 + 41572140.

It is an arithmetic number, because the mean of its divisors is an integer number (41572140).

Almost surely, 2^83144279 is an apocalyptic number.

83144279 is a deficient number, since it is larger than the sum of its proper divisors (1).

83144279 is an equidigital number, since it uses as much as digits as its factorization.

83144279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 83144279 is about 9118.3484798509. The cubic root of 83144279 is about 436.4596739232.

The spelling of 83144279 in words is "eighty-three million, one hundred forty-four thousand, two hundred seventy-nine".