83930145849 has 27 divisors (see below), whose sum is σ = 133270664709. Its totient is φ = 50860960920.

The previous prime is 83930145809. The next prime is 83930145853. The reversal of 83930145849 is 94854103938.

The square root of 83930145849 is 289707.

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

It is a de Polignac number, because none of the positive numbers 2^k-83930145849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83930145795 and 83930145804.

It is not an unprimeable number, because it can be changed into a prime (83930145809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9555942 + ... + 9564720.

Almost surely, 2^83930145849 is an apocalyptic number.

83930145849 is the 289707-th square number.

83930145849 is the 144854-th centered octagonal number.

It is an amenable number.

83930145849 is a deficient number, since it is larger than the sum of its proper divisors (49340518860).

83930145849 is an frugal number, since it uses more digits than its factorization.

83930145849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17586 (or 8793 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 83930145849 in words is "eighty-three billion, nine hundred thirty million, one hundred forty-five thousand, eight hundred forty-nine".