83072878949 has 4 divisors (see below), whose sum is σ = 83507815680. Its totient is φ = 82637942220.

The previous prime is 83072878937. The next prime is 83072878981. The reversal of 83072878949 is 94987827038.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83072878949 - 2¹² = 83072874853 is a prime.

It is a super-2 number, since 2×83072878949² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83072878919) 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 3 ways as a sum of consecutive naturals, for example, 217468079 + ... + 217468460.

It is an arithmetic number, because the mean of its divisors is an integer number (20876953920).

Almost surely, 2^83072878949 is an apocalyptic number.

It is an amenable number.

83072878949 is a deficient number, since it is larger than the sum of its proper divisors (434936731).

83072878949 is a wasteful number, since it uses less digits than its factorization.

83072878949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434936730.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 83072878949 in words is "eighty-three billion, seventy-two million, eight hundred seventy-eight thousand, nine hundred forty-nine".