83477509 has 2 divisors, whose sum is σ = 83477510. Its totient is φ = 83477508.

The previous prime is 83477503. The next prime is 83477519. The reversal of 83477509 is 90577438.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80604484 + 2873025 = 8978^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 83477509 - 2³ = 83477501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83477501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41738754 + 41738755.

It is an arithmetic number, because the mean of its divisors is an integer number (41738755).

Almost surely, 2^83477509 is an apocalyptic number.

It is an amenable number.

83477509 is a deficient number, since it is larger than the sum of its proper divisors (1).

83477509 is an equidigital number, since it uses as much as digits as its factorization.

83477509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 83477509 is about 9136.6027056012. The cubic root of 83477509 is about 437.0419853291.

The spelling of 83477509 in words is "eighty-three million, four hundred seventy-seven thousand, five hundred nine".