83490368809 has 3 divisors (see below), whose sum is σ = 83490657757. Its totient is φ = 83490079862.

The previous prime is 83490368791. The next prime is 83490368813. The reversal of 83490368809 is 90886309438.

The square root of 83490368809 is 288947.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90886309438 = 2 ⋅45443154719.

It is not a de Polignac number, because 83490368809 - 2¹¹ = 83490366761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83490360809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 144474 + ... + 433420.

Almost surely, 2^83490368809 is an apocalyptic number.

83490368809 is the 288947-th square number.

83490368809 is the 144474-th centered octagonal number.

It is an amenable number.

83490368809 is a deficient number, since it is larger than the sum of its proper divisors (288948).

83490368809 is an frugal number, since it uses more digits than its factorization.

83490368809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577894 (or 288947 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 83490368809 in words is "eighty-three billion, four hundred ninety million, three hundred sixty-eight thousand, eight hundred nine".